This book covers basic ideas of the transportation system. It helps students to learn various aspects of the transportation system.
1. Transportation 22 Systems 22.1 Land Transportation 22.2 Water Transportation 22.3 Air and Space Transportation Name the different types of land transportation. • Summarize the purpose of transportation subsystems. Examine the purpose of a transmission. Tell how oceans and inland waterways are used for transportation. List the different types of ships. Define the concept of intermodal transportation. Discuss ways in which air and space transportation are used. Identify different types of aircraft and spacecraft. Explain how an airplane is lifted into the air. Explore the Photo A Pleasant Trip After travelers leave a har- bor or airport, they might take a bus, taxi, or commuter plane to their next destination. A passenger tells the pilot he or she has had a nice trip. Is this part of the transportation system? 468 Unit 7 Transportation Technologies
2. Build a Rubber-Band- Powered Vehicle At the end of this chapter, you will make a simple land transportation vehicle powered by a rubber band. Get a head start by using this checklist to prepare for the Technology Lab. PROJECT CHECKLIST ✓ Study the designs of different land vehicles at the library or on the Internet. ✓ Ask your teacher about what materials you will need for the project. ✓ Review your classroom’s procedures and safety rules. 469 John Warden/SuperStock
3. 22.1 Land Transportation Preview What are some examples of land transportation vehicles? Content Vocabulary Graphic Organizer mass transportation Draw the section diagram. Use it to organize transmission and write down information as you read. driving wheel front-wheel drive Impacts of Land Transportation rear-wheel drive Automobiles Mass Transportation four-wheel drive tractor-trailer Positive bullet train Negative maglev train Academic Vocabulary Go to glencoe.com to this book’s OLC for a downloadable graphic organizer and more. You will see these words in your reading and on your tests. Find their meanings at the back of this book. role interact TECHNOLOGY STANDARDS STL National Standards for Technological STL 4 Cultural, Social, Economic & Political Effects Literacy STL 12 Use & Maintenance NCTM National Council of Teachers of Mathematics STL 18 Transportation Technologies NCTE National Council of Teachers of ACADEMIC STANDARDS English Science NSES National Science Education Standards NSES Content Standard E Understandings about NCSS National Council for the Social Studies science and technology NSES Content Standard F Science and technology in society Transportation Systems What is mass transportation? A transportation system is a way of moving people or products from place to place. Transportation systems have inputs, pro- Connect What differ- cesses, outputs, and feedback. For example, inputs to a city bus ent kinds of subsystems system include bus drivers and fuel. Processes include driving the do land transportation bus and loading passengers. The output is arrival at scheduled vehicles have? stops. Feedback includes comments from satisfied customers. 470 Unit 7 Transportation Technologies
4. Transportation systems are interrelated. Each system depends age fotostock on the other systems. Buses and cars, for example, take passengers to airports and ship docks. Transportation systems are part of the larger technological, social, and environmental systems in our world. Land Transportation When you travel in a car, bus, or train, you are using a land transportation vehicle. Land transportation also includes travel by bicycle, motorcycle, and subway. Automobiles are an important part of our land transportation system. However, you need more than just a car to get from place to place. Roads, bridges, and ser- vice centers are just a few of the subsystems within a land trans- portation system that allow you to use your family car. About half of all the world’s automobiles are used in the United States. Mass Transportation Mass transportation moves many people at one time and is available to the general public. However, it is expensive to develop mass transportation systems that can serve a large country. That is one reason why the automobile has become an important part of our land transportation system. Automobiles are for personal transportation, not mass transportation. Mass transportation is sometimes slower and less convenient. However, people who use mass transportation do not have to worry about parking their Mass Transportation cars or paying for gas, parking tickets, or car insurance. Tokyo, the capital of Japan, has a reliable and clean Recall What are types of land transportation? rapid transit system with trains that run above and below ground. More Automobiles than 7 million people use Tokyo’s trains each day. What does “four-wheel drive” mean? Why is it easier to build an efficient mass transporta- Modern automobiles are quite different from early models. tion system in a city? However, your family car has at least two things in common with those early models. Both have trans- missions, and nearly all have front- mounted engines. Transmission A car’s transmission contains gears and other parts that transfer power from the engine to the axles and wheels. The gears work on the same principles as gears on a bicycle. Chapter 22 Transportation Systems 471
5. When you pedal up a hill, you shift into low gear because it takes more effort to pedal up the hill. The rear wheel moves more slowly. On level ground, it takes less effort to pedal, and the rear Moving More People, wheel of the bicycle turns more quickly. See Figure Making Less Impact 22.1. A car’s engine operates best if you use a low The nonprofit Design Trust for Pub- gear while climbing a steep hill or when starting lic Space called for the “greening” of from a stop. Using a high gear is best when driving taxicabs. In New York some 13,000 gas guzzlers jam the already congested on a flat road. streets. At an exhibit in 2007, several eco-friendly prototypes were intro- Driving Wheels duced, including a boxy one by Vehicle The power from your legs is transferred to your Production Group. It stands six feet tall, bicycle’s rear wheel with a chain. The rear wheel allows for wheelchair access, and uses is a bicycle’s driving wheel. A car does not use a less gas. chain. Instead, it transfers power with one or two Critical Thinking List some metal shafts called “drive shafts.” Most cars trans- other ways urban areas can fer power to the front wheels and are known as improve their environmental front-wheel drive cars. Some cars transfer power to the rear wheels. They are rear-wheel drive cars. Go to glencoe.com to this book’s Some send power to all four wheels. These cars are OLC to read more about this news. four-wheel drive, or all-wheel drive, cars. Other Subsystems An automobile has many subsystems. Besides the transmission and driving wheels, some subsystems include those that provide structure and support (frame), propulsion (engine), and guidance (steering wheel). Others are safety related (air bags). Some cars have mapping computers that connect to GPS satellites. Many of these subsystems are manufactured by outside sup- pliers. The anti-lock braking system (ABS), for example, is not usually made by the same company that makes the car. The CD player, tires, and windshield may also be manufactured by a different company. 22.1 Transmission HIGH GEAR LOW GEAR L H Small Large Large sprocket Small sprocket sprocket sprocket Shifting Gears A car’s transmission works just like the gears in a bicycle. High gear combines the larger crank sprocket with the smallest sprocket at the rear wheel. What combination of sprockets does low gear use? 472 Unit 7 Transportation Technologies
6. Summarize What is the transmission in an automobile? How did school buses help promote better schools? Buses usually carry 30 or more passengers and are used for mass transportation between cities. This is called “intercity trans- portation.” Buses are also used for transportation within cities and for school transportation. School systems in the United States alone use over 400,000 buses. School Buses School buses were being used as early as 1920. They made it possible to gather students together from small rural schools into one larger school with improved facilities. Millions of students ride safe and sturdy buses to school each day. Buses are made from strong steel to meet federal manufacturing requirements. Seats and other support systems are specially designed for safety. Many use diesel fuel, which would not burn as easily as gasoline if an unexpected leak should occur. Intercity Buses Intercity buses are also powered by diesel engines. These types of buses carry up to 64 seated passengers. They are generally less expensive for passengers to ride than trains or airplanes. They also make stops at smaller communities that are not served by trains and airplanes. The Black Box English Language Arts/Writing Many cars today have data recorders, or “black Big Brother Is Watching People might be boxes,” as part of their control systems. The more likely to obey traffic laws if they know black box monitors the release of safety air bags their actions are being recorded. But is this in an accident. It also records the driving actions an invasion of privacy? of the driver. 1. George Orwell, the author of the novel Caught in the Act If an accident happens, the 1984, once said, “Men are only so good as police and insurance companies can use the their technical developments allow them black box to see what the driver was doing. to be.” What did he mean? If the driver was speeding or doing anything 2. Do you agree with the quote? Write a one wrong, the accident could be considered his or paragraph response. her fault. Chapter 22 Transportation Systems 473
7. 22.2 Wind Deflectors Urban Buses Urban buses can carry more people than intercity buses because they allow some passengers to stand. Use of urban buses eases traf- fic congestion and saves fuel. They use about one-third as much fuel per passenger as do automobiles. However, urban buses account for only 15 percent of all passenger miles traveled in the United States. Summarize Why are school buses safe? Air Resistance A wind deflector on top of the truck cab can save fuel costs each year. Why? Trucks What is the purpose of a truck’s wind deflector? American cities rely on trucks to supply them with food, fuel, furniture, and other products. Trucks play an important role in transportation. They go directly from the supply location to the customer. Most trains, airplanes, and ships do not do that. Types of Trucks We use hundreds of different kinds of trucks. Most are diesel powered, but gasoline engines are also used. Some commercial trucks are as small as pickup trucks. Others are as large as the 18-wheel semi-trailer trucks that carry cargo on interstate high- ways. These large trucks are also called tractor-trailers. There is no such thing as a standard truck, but there are three general types: light duty, medium duty, and heavy duty. Panel and pickup trucks are examples of light-duty trucks. Medium-duty trucks are used locally and include sanitation trucks, soft drink delivery trucks, and heating oil trucks. Heavy-duty trucks carry large loads, and an 18-wheel tractor-trailer is one type. Wind Deflectors The flat front and square shape of many trucks present a large surface that the air can press against. This means that the trucks waste fuel. Some manufacturers place a wind deflector on the tractor’s roof. A deflector directs the air around the truck, which reduces resistance and saves fuel. See Figure 22.2. Identify What are the truck types? 474 Unit 7 Transportation Technologies
8. China Images/Alamy Locomotives What kind of engines replaced steam engines in locomotives? Railroads earn most of their money by hauling freight. They deliver bulky items like coal and iron ore. They also carry things such as automobiles and television sets. About 10,000 freight trains roll over the tracks each day. Some are over 200 cars long. Trains also carry passengers, and the busiest lines are on the East Coast. These are operated by AMTRAK, the intercity passen- ger railroad system. Travel between the terminals at Washington, D.C., and Boston, Massachusetts, including cities along the way, is quite popular. The distances are fairly short, and the trains travel directly from downtown to downtown. However, trains carry less than 1 percent of all U.S. intercity passengers. That is a very low number. In some countries, trains carry up to 50 percent of inter- city travelers. Commuter and subway trains transport workers, tourists, students, shoppers, and others to their daily destinations. They are also part of the mass transportation network. High-Speed Trains The newest all-electric locomotives, called bullet trains, travel at Magnetism The high speeds. The speed and the pointed shape of the locomotive’s Shanghai Maglev Train nose inspired its name. Japan’s Shinkansen was the first bullet carries passengers train in 1964. 22 miles in seven min- The bullet train in the United States is the Acela Express, for utes using electromag- acceleration and excellence. Several all-electric stainless steel netic force. Since maglev trains float in the air, how trains entered service in the year 2000. Each six-coach train can do they slow down and carry over 300 passengers at speeds up to 150 mph. then stop? Maglev Trains Another new kind of train does not roll on wheels. It does not even touch the ground. The train is called a maglev train. Maglev stands for “magnetic levitation.” The forces of magnetic attraction and repulsion allow the train to float, or levitate, less than one inch above its guideway, or path. The same forces interact to move the trains. Chapter 22 Transportation Systems 475
9. Maglevs are very quiet and produce almost no vibration. How- ever, they are expensive to construct. Only a few experimental ones have been built in the United States. The first maglev to enter The Language Barrier commercial service runs on a 22-mile line to the Shanghai airport Large tractor-trailer in China. The train’s highest speed during the trip is normally trucks, which are called about 260 miles per hour. It was built in Germany and began pas- “18-wheelers” in the senger service in 2004. United States, are known as articulated lorries in Britain. A “dual- Explain What does the word maglev mean? carriage way” in Britain is a divided highway in the United States. High- Pipelines speed, limited-access roads or interstate high- How is cargo transported through pipelines? ways are called “motor- When you turn on a faucet to get a drink of water, you are ways” in Britain. using a transportation system. Some cargo, like water, oil, and Apply Use a dictionary natural gas, travels long distances through pipelines. Pipes may be to look up the words as small as two inches in diameter or as large as 15 feet in tram, omnibus, caravan, diameter. Most pipelines are buried in the ground. and the underground. What terms are used in Pipelines require service facilities such as pumping and control the United States? stations. The stations are located along the pipeline and keep the cargo moving. When the cargo is made of particles, such as gravel, it is mixed with liquids to form a “slurry.” The pumps then force the material through the pipeline. 22.1 Self-Check Mathematics 1. Identify the purpose of a transmission. 6. A tractor-trailer is hauling 32 television sets. Each TV 2. Describe how an intercity bus is used. Explain how weighs 112 pounds. What is the total weight of the this is different from the use of an urban bus. cargo after eight of the TVs are delivered? 3. Explain what causes a maglev to “float” above its Two-Step Problems Problems that guideway. require two calculations to solve take some extra Think concentration. 4. Some people think that high-speed trains instead 1. The first step is to determine the number of TVs of airplanes should be used for distances less than that are left in the truck. 200 miles, especially in highly populated areas. 2. After you determine the number of TVs, use Discuss why you think this might be desirable. multiplication to determine the total weight. Practice Academic Skills For help, go to glencoe.com to this book’s OLC and find the Math Handbook. Social Studies 5. Use the Internet to learn about bullet trains used in Japan, England, France, Germany, and Spain. Report your findings to the class. 476 Unit 7 Transportation Technologies
10. 22.2 Water Transportation Connect What are the different types of water transportation? Content Vocabulary Graphic Organizer navigable waterway Draw the section diagram. Use it to organize displacement and write down information as you read. supertanker intermodal transportation Water Transportation Vessels containership Academic Vocabulary overseas via Go to glencoe.com to this book’s OLC for a downloadable graphic organizer and more. TECHNOLOGY STANDARDS STL National Standards for Technological STL 3 Relationships & Connections Literacy STL 4 Cultural, Social, Economic & Political Effects NCTM National Council of Teachers of Mathematics STL 18 Transportation Technologies NCTE National Council of Teachers of ACADEMIC STANDARDS English Social Studies NSES National Science Education Standards NCSS Content Standard 2 Time, continuity, and change NCSS National Council for the Social Studies Science NSES Content Standard F Science and technology in society What is a navigable waterway? Water has provided transportation routes for centuries. Oceans, rivers, lakes, and other navigable waterways have made natural routes between cities, states, countries, and continents. A navigable waterway is a lake or river that is deep and wide enough to allow ships and boats to pass. The five Great Lakes are navigable waterways, as are many rivers, such as the Mississippi and Ohio. Engineers can also construct canals through which boats and Predict How does ships can pass. The Suez Canal in Egypt connects the Mediterra- intermodal transporta- nean Sea with the Red Sea, allowing ships to carry cargo back and tion help move people forth between Europe and Asia. and cargo? Chapter 22 Transportation Systems 477
11. It usually costs less to transport goods by water than by rail, highway, or air. Whenever possible, people try to save as much money as they can by transporting products the cheapest way. Explain How are navigable waterways used for transportation? Boats and Ships What is the difference between a boat and a ship? A small, open vessel is called a “boat.” A large, deep-water vessel is called a ship. There are about 24,000 ships in the world. There are three general types of water transportation vessels. Passenger vessels that carry people are one type. Cargo ships are another type. They transport oil, grain, iron ore, automobiles, and many other products. Specialty craft include every other type, such as river barges used for transporting coal and other goods, tugboats for pulling large ships into dock, and icebreakers. Overseas Cargo Ships deliver most of the overseas cargo leaving or arriving in the United States. To transport by ship, we need docks with spe- cial loading and unloading equipment. We need properly trained people to operate the ship. We also need good communications Luxury Ships Large for weather data and other information. They are all necessary luxury ships like the for the entire system to operate efficiently. Navigator of the Sea are used as vacation cruise liners. How do such large Heavy Ships ships maneuver into a For many centuries, people used sailing ships to haul cargo and tight dock space? passengers. The ships of the 1800s had displacements of about 1,200 tons. Displacement is a measure of how much water a ship and its cargo push aside as the ship floats. It is an indication of the ship’s size. Today an aver- age cargo ship might have a displacement of 21,000 tons. A heavy ship is difficult to move, so today’s ships are pushed by powerful engines. Ocean liners and cargo ships often use gas turbine or die- sel engines. Used with permission of Royal Caribbean Cruises Ltd. 478 Unit 7 Transportation Technologies
12. Thinkstock Images/Jupiter Images Ivan Getting Inventor of GPS Ivan Getting, who was born in New York City in 1912, was a physicist and electrical engineer. His early contributions to the world of tech- nology included research on the use of radar, ballistic missiles, and microwave tracking systems during World War II. In 1960, he founded the Aerospace Corporation. Getting is best known for his original ideas about the Global Positioning System (GPS). In the 1970s, Bradford Parkinson of the U.S. Air Force was appointed to run the GPS program for the U.S. Department of Defense using Getting’s ideas. By 1978, the NAVSTAR GPS was functional and accurate within three meters. Map to Reward GPS uses satellites orbiting above the earth for mapping and navigation. In 2003, the year Getting died, he and Parkinson were honored with the Charles Stark Draper prize of $500,000 for their invention. English Language Arts/Writing Describe in a short essay the importance of Get- ting’s GPS invention to the 21st Century. Go to glencoe.com to this book’s OLC to learn about young innovators in technology. It is not unusual for a large modern ship to displace 100,000 tons. That means it is about 80 times bigger than a ship of the 1800s. Very large ships called supertankers transport oil across oceans in storage tanks. Their displacements are as high as 500,000 tons. Does this tell you why they are called supertankers? Recall What are the different kinds of water transportation vessels? Intermodal Transportation Can modes of transportation be linked to carry people or products? Can you think of a time when you used more than one mode (form) of transportation in a single journey? When two or more modes of transportation are used together to move people or cargo more efficiently, it is called intermodal transportation. Predict What is intermodal transportation? Moving People To understand how intermodal transportation helps move people, imagine that you are going to take a cruise. To get to the city where you will board ship, you need to take an airplane. Chapter 22 Transportation Systems 479
13. In order to reach the airport, you might take a bus to a subway station, and then travel to the airport via subway train. You might Ecotourism also drive your own car or take an airport shuttle. Tourism can result in Different systems have been organized to work together to help gaudy hotels, create you. There is a bus stop near the subway station, a subway stop at overpriced restaurants, the airport, and a taxi to take you from the airport in the coastal and generate trash. It city to the cruise ship. can displace and incon- venience local people. Ecotourism includes Moving Cargo tourism practices that Cargo is moved most efficiently when it is packed into large try to preserve the envi- containers. When a product travels overseas, the containers are ronment and improve loaded on ships called containerships. Loading and unloading the well-being of the is easy because the containers are usually the same size and the locals. same shape. Try This Next time you Containers can then be loaded onto a train. The products do travel, consider the not have to be unpacked and then repacked. Some containers are effect you have on the designed as truck semi-trailers. They ride on trains to a terminal, places you visit. where they are then attached to truck tractors. They continue their journey on the highway. Because intermodal transportation is so efficient, it saves time and money. 22.2 Self-Check Mathematics 1. Identify the difference between a boat and a ship. 6. Xavier is going to take his boat across a lake that is 2. Name the three general types of water transportation four miles wide. A bandstand is directly across the vessels. lake. Three miles to the bandstand’s right is a dock for 3. Explain why intermodal transportation is so efficient. boats with a playground. If Xavier decides to go on his Think boat to the playground, what distance will he have to 4. Describe how you think engine-powered ships travel across the lake? affected society when they were first introduced. Pythagorean Theorem The Pythagorean theorem states that the sum of the squares of the Practice Academic Skills lengths of the two shorter sides of a right triangle Social Studies equals the square of the length of the third side, 5. Look up information and write a short report on how called the “hypotenuse.”This formula allows you to a particular transportation system is a part of the determine the unknown length of a side if you know technological, social, and environmental systems that the other two lengths. make up our world. 1. Draw a diagram of the possible paths he could take. Label the distances that are given. 2. Use the Pythagorean theorem to determine the distance to the playground. For help, go to glencoe.com to this book’s OLC and find the Math Handbook. 480 Unit 7 Transportation Technologies
14. 22.3 Air and Space Transportation Connect What are the main types of air transportation vehicles? Content Vocabulary Graphic Organizer lift Draw the section diagram. Use it to organize commercial airplane and write down information as you read. jumbo jet helicopter Air and Space Transportation lighter-than-air craft K W L payload Academic Vocabulary complex approach Go to glencoe.com to this book’s OLC for a downloadable graphic organizer and more. TECHNOLOGY STANDARDS STL National Standards for Technological STL 3 Relationships & Connections Literacy STL 4 Cultural, Social, Economic & Political Effects NCTM National Council of Teachers of Mathematics STL 12 Use & Maintenance NCTE National Council of Teachers of ACADEMIC STANDARDS English Science NSES National Science Education Standards NSES Content Standard E Understandings about science NCSS National Council for the Social Studies and technology NSES Content Standard D Earth in the solar system Air Transportation What is a jumbo jet? Transportation by air takes place in airplanes, helicopters, and lighter-than-air craft. Hang gliders and sailplanes are used for recreation. Military airplanes are used for defense. Can you think of other vehicles for air transportation? Airplanes are the most important part of our air transportation system. However, many other components are necessary for safe air travel. For example, we need airports, training programs, and Compare What are radar. Many airplanes are in the air at the same time. This is why some of the uses air travel is our most complex transportation system and is regu- for air and space lated by the government. transportation? Chapter 22 Transportation Systems 481
15. Airplanes Did you ever wonder how something as heavy as an airplane could get off the ground? The secret is in the shape of the airplane’s wing. As the airplane approaches the runway, it gathers speed and air rushes over the wing. The shape of the wing causes the air to travel faster over its upper surface. See Figure 22.3. This reduces air pres- Welcome Aboard sure above the wing. It also helps increase the pressure on the This Boeing 777 aircraft wing’s lower surface, pushing it upward and creating lift. Almost can carry up to 500 pas- like magic, the airplane rises. sengers from San Fran- cisco to Tokyo at speeds Commercial Airplanes up to .84 Mach. What Many important airplanes were built and flown after the components are neces- Wright brothers’ first flight in 1903. One of the most important sary for safe air travel? airplanes was the 1935 DC-3, which had two gasoline engines. It was the first commercial airplane as it made a profit by carrying just passengers. The Boeing 707 came out in 1958 and carried 179 passengers, a huge number at the time. In following years the number of airline passengers increased so much that manufacturers decided to build jumbo jets, very large jet airplanes that can carry about 500 pas- sengers. The first was the Boeing 747. Because jumbo jets have such powerful engines, they can lift more weight than other airplanes. This allows them to carry a lot of fuel. As a result, they can stay up in the air for a long time. Jumbo jets can fly non-stop from Cincinnati to London and from Detroit to Tokyo. Smaller Jets Smaller jet aircraft, like the two-engine Canadair RJ-200, are used on shorter flights between smaller cities. They use less fuel and do not need a long runway to take off. 22.3 Lift LIFT Low air pressure Wing The Secret of Flight The lower air pressure Airflow above the wing helps cre- ate lift. What happens to the air pressure if the plane High air pressure starts to slow down? 482 Unit 7 Transportation Technologies
16. Bill Howe/Alamy Cargo Planes Some airplanes carry only cargo. However, even the biggest air- plane can carry only a fraction of what a ship or train can haul. A Boeing 747 can carry 100 tons of cargo. Transport by air can be very expensive. Therefore only lightweight items, such as mail and electronics, are usually shipped by air. Helicopters A helicopter is an aircraft with one or two rotors that allow it to lift straight up. The twirling blades of the rotor create lift. Some helicopters also have small tail rotors to keep them from spinning out of control. Helicopters can be as small as a one-person machine or as large as a cargo-carrying helicopter capable of lifting ten tons. Passen- ger-carrying helicopters connect some large cities with major air- ports. Some helicopters deliver parts to construction sites. Others are used to check on traffic or to transport people to hospitals. Lighter-than-Air Craft Lighter-than-air craft include aircraft such as dirigibles, blimps, and airships. Helium lifts them into the air, and gasoline engines turn propellers to move them forward. The engines are located in gondolas, or cars, that are suspended from the craft. The passen- ger compartment is located in a separate gondola. A hot-air balloon is also a lighter-than-air craft. It uses large Work Space This torches to heat the air inside a huge nylon bag. Hot air weighs less space shuttle is in orbit than cooler air, so the balloon rises. The pilot controls the balloon 115 miles above the by ascending or descending into wind currents. earth. What usually happens during a typical space shuttle mission? Explain How is an airplane able to lift up into the air? Space Vehicles What does NASA do? The National Aeronautics and Space Administration (NASA) is responsible for regulating and directing the entire U.S. space program. This includes the space shuttles and vehicles for exploration. Identify What do the letters NASA stand for? Chapter 22 Transportation Systems 483
17. Space Shuttles The first space shuttle that went into orbit was the Columbia in 1981. On a typical mission, a space shuttle with four astronauts orbits 115 miles above the earth. Each flight carries cargo, called Back to the Moon a payload, in the large cargo bay. The payload can weigh up to Imagine flying to the 65,000 pounds. moon in a space shut- Shuttle speed is about 17,000 miles per hour. Once in orbit, an tle. NASA is preparing astronaut opens the cargo bay doors, which may contain a com- to return to the moon munications satellite. The astronaut controls a 50-foot mechanical with a project called Constellation. To get arm that grabs the satellite and releases it a safe distance from the there, they are working shuttle. The arm can also grab satellites already in orbit. on designing a new type of rocket that com- Shuttle Missions bines the best features The space shuttle can also carry a complete scientific laboratory of the space shuttle in the cargo bay. However, many laboratory experiments are now and the Saturn V, which done on the International Space Station (ISS). A shuttle mission first took astronauts to can also include carrying supplies to the ISS. the moon. The rocket is named Ares 1. Engi- To return to earth, the astronauts fire small rockets to slow neers hope to have it down the space shuttle. It re-enters the atmosphere and glides flying by 2014. What do toward a landing strip. Space shuttle astronauts have a very dan- you think are some of the gerous job, and several have been lost during in-flight failures. For criteria and constraints example, seven astronauts on the Challenger in 1986 and another for designing the Ares I? seven on the Columbia in 2003 perished during their missions. Go to glencoe.com Spacecraft can also travel without astronauts. These ships con- to this book’s OLC for sist of hollow containers mounted on booster rockets. The hollow answers and to learn containers usually carry satellites for communication or scientific more about the Ares 1. research. Once a spacecraft is in orbit, its container opens, and the satellite is put into position. The satellite then begins orbiting on its own. 22.3 Self-Check them. Imagine you are chosen to be an astronaut on 1. Name the type of jet that carries the most passengers. one of these missions. Write a short story describing 2. List several jobs that helicopters perform. your experience going to the moon. 3. Explain the letters NASA. Science Think 6. The space shuttle is the first reusable spacecraft that 4. Explain the value you think the space program has for NASA has used. Some feel that the space shuttle pro- the development of technology for use on Earth. gram is dated and becoming obsolete. Research new Practice Academic Skills space shuttle designs. Write a few paragraphs about the designs you find and explain their advantages English Language Arts/Writing over the current space shuttle design. 5. Do research on new rockets designed to take people to the moon and the types of missions planned for 484 Unit 7 Transportation Technologies
18. Ronnie Coursey AIR-TRAFFIC CONTROLLER Q: What is a typical day like at your job? A: The typical day begins with information briefings on air-space conditions, weather, traf- fic flow control, and equipment status. Then I receive a position-specific briefing before assum- ing control of a sector. A controller ensures that all aircraft are separated and controlled in a safe, orderly, and expeditious manner. Air-traffic con- trollers are limited to two hours at a time on each position. We rotate control positions often and receive a new briefing each time. English Language Arts/Writing Q: What kind of training and education did you On-the-Job Communication In need to obtain your job? order to succeed in most careers, it is A: I received most of my basic air-traffic train- important to have good communica- ing in the U.S. Army. Also, the math and science tion skills. courses I took in high school were essential. 1. Interview three adults. You can interview anyone who works Q: What do you like most about your job? full-time, including an air-traffic A: No two days are alike. Air traffic is very controller. 2. Ask him or her to explain how dynamic, because the number and types of air- they use communication skills craft, weather, turbulence, and destinations are on the job, and to give you some always changing. This job never gets boring! examples. 3. Summarize your findings in a one- Q: How did you get interested in your job? page report. A: I joined the Army because I wanted to have the opportunity to train for a good career and receive educational benefits while serving my Go to glencoe.com to this book’s country. I looked for a career that was fun, chal- OLC to learn more about this lenging, and offered good pay in a civilian life, career. and I found it. Speaking, listening, Science, mathematics, Growth as fast as average for organization, English language arts, social the next ten years problem-solving studies Source: Occupational Outlook Handbook Chapter 22 Transportation Systems 485 Donald C. Johnson/Corbis
19. 22 Review and Assessment Section 22.1 About half of all Section 22.2 There are about Section 22.3 Jet airplanes the world’s automobiles are 24,000 large deep-water servicing smaller airports do used in the United States. The vessels in the world. Displace- not need a long runway and car’s transmission contains ment is the measure of how use less fuel. Helicopters can gears for transferring power. much water a vessel moves carry cargo, and some can eas- Buses are an important part aside as it floats. Intermodal ily lift ten tons. The force that of mass transportation. Some transportation combines allows a plane to rise in the air larger trucks use deflectors to several different kinds. Cargo is is called “lift.” During missions, reduce air resistance. A train often placed in containers for space shuttles orbit about that floats over a guideway is efficiency. 115 miles above the earth. called a “maglev.” 1. On a sheet of paper, use each of these terms and words in a written sentence. Content Academic Vocabulary tractor-trailer lift Vocabulary mass bullet train commercial role transportation maglev train airplane interact transmission navigable jumbo jet overseas driving wheel waterway helicopter via front-wheel displacement lighter-than-air complex drive supertanker craft approach rear-wheel intermodal payload drive transportation four-wheel drive containership 2. Describe the different types of land transportation. 3. Explain the purpose of transportation subsystems. 4. Explain the purpose of a transmission. 5. Describe how oceans and inland waterways are used for transportation. 6. Identify the different types of ships. 7. Explain the concept of intermodal transportation. 8. Discuss ways in which air and space trans- portation are used. 9. Identify types of aircraft and spacecraft. 10. Explain how a plane is lifted into the air. 486 Unit 7 Transportation Technologies John Warden/SuperStock
20. 11. Driving Wheels A car’s driving wheels Social Studies can be in the front or in the rear. Other 13. When deciding how to transport cars have all four wheels as driving goods, people base their decision on wheels. Research what configura- price, safety, and speed. Research dif- tion your family’s car has. Write a few ferent shipping methods. Write a few paragraphs describing the car, and the paragraphs comparing the different advantages and disadvantages of the ways goods can be shipped. Include a different types of driving wheels. discussion about why some modes are preferred. Technology Skill 12. Lighter than Air Aircraft that fly Mathematics because they are lighter than air include 14. The Mach number is the speed of some- blimps, zeppelins, dirigibles, and more. thing, relative to the speed of sound. a. Obtain a helium-filled balloon and The speed of sound is called Mach 1. If see how much weight it will lift by something is traveling at Mach 1.2, it is attaching weights to its string. going 1.2 times the speed of sound. If the b. Based on what you determine in step speed of sound is 735 mph, how fast is a one, figure out how many balloons it plane traveling if its speed is Mach 1.8? would take to lift you. If you are not Operations If a problem uses sure of your weight, weigh yourself. the word times, it is indicating that mul- tiplication should be used. To determine the speed of sound based on a Mach number, simply multiply the given speed of sound by the Mach number. Directions Choose the letter of the best Aerospace Engineer answer. Write the letter on a separate Situation You and your team will design and piece of paper. build a glider. Your teacher will determine the 1. What is the cost of a $56.50 glider’s minimum and maximum dimensions. computer program if it is You will launch the glider by an elastic band. discounted 20%? Activity Design the glider model within the A $22.80 C $45.20 given constraints and criteria. Make a series of B $56.30 D $11.30 sketches. Then make a working model of your glider and conduct flight tests. Make changes 2. The lift of a wing is a result of as needed. Finally, conduct a series of five final the high pressure generated on flight tests, recording the times aloft. top of the wing. T F Evaluation Time aloft—total number of seconds of five flights Test-Taking Tip Learn ahead of time the kind Go to glencoe.com to this book’s OLC for of test you will be taking, when and where the information about TSA events. test will be, and what materials to bring. Chapter 22 Transportation Systems 487
21. 22 Build a Rubber-Band- Powered Vehicle Modern land vehicles have many basic parts that are the same as those used hundreds of years ago. Most have wheels, a body, and a way to provide power. You can learn more about land vehicles Tools and by making your own. ✓ One wooden block, 1 inch thick, 2 inches wide, and Set Your Goal 6 inches long ✓ Two wooden ready- For this activity, you will make a simple land vehicle powered by made wheels, a rubber band. You will then experiment with the design to see about 2¼ inches in if you can make the vehicle go faster or farther. diameter ✓ Two wooden ready- Know the Criteria and Constraints made wheels about In this lab, you will: 1 inch in diameter ✓ One dowel rod, 1. Follow the basic design in the picture for your first vehicle. 3∕8 inch in diameter 2. Keep a record of all speed and distance measurements. and about 3 or 3. Submit sketches of your design improvements. 4 inches long ✓ Three heavy rubber Design Your Project bands, ¼ inch wide and about 2 inches Follow these steps to complete this lab. in diameter 1. Look at the drawing of the completed vehicle on page 489. ✓ Staples 2. Build the vehicle. ✓ About 18 inches of Drill a 3∕8-inch hole at one end of the body, as depicted in picture 1. fishing line Use the saw to cut notches at the front and rear. ✓ Punch Put the dowel rod through the hole. ✓ Wire cutters Cut it to length and attach the two 2¼-inch wheels. ✓ Hand drill with Body Detail 3∕8-inch drill bit 1. 2. Assembly of ✓ Hammer 3/4" front roller 3/8" ✓ Tape measure, 1/2" 3/8" 9/16" 25-feet long 1 3/4" 5/8" Kerf 1" ✓ Saw 9/16" 3/8" 6" 3. Attaching 4. Marking 5. Winding wheels rubber band center of of the vehicle in axle preparation for operation
22. Place a rubber band around the outside of Completed Vehicle each wheel. These wheels will be your car’s Rubber drive wheels, providing its driving power. Rubber band Fishing line Mark the center of the dowel rod with a band punch and hammer in a small nail. Leave tire Roller about ¼ inch sticking out. Brad Attach the front wheels with small nails. Make sure all four wheels can spin freely. REAR Staple BODY Make the front roller from a /8 -inch-long 1 Axle section of the dowel rod. Hammer small nails into each end and cut off the nail heads. Attach the roller to the body with staples, as shown in picture 2. Do not drive the staples too deep. The roller must turn easily. Attach a rubber band to the bottom of the body by hammering in a staple, as depicted in picture 3. Tie one end of the fishing line to the rubber band. Pass the line over the front roller and under the body of the vehicle. Tie the other end of the fishing line to the small nail on the dowel rod connecting the large wheels. To provide power for your car, wind the larger wheels backward, as in picture 5. Continue until all the fishing line is wound onto the axle and the rubber band is stretched over the front roller. Reminder 3. Place your vehicle on a smooth floor and let go. It will quickly acceler- In this activity, you ate and then coast to a stop. will be using tools and Use the 25-foot tape measure to measure how far it traveled. materials. Always fol- Use a stopwatch to measure its speed. low appropriate safety Repeat a few times to get averages of speed and distance. procedures and rules so you and your class- 4. Sketch several improvements for the vehicle and try them out. mates do not get hurt. Evaluate Your Results After you complete the lab, answer these questions on a separate piece of paper. 1. Did your vehicle travel as fast as you expected it would? 2. How did you change your vehicle to make it go faster or farther? 3. What would happen if you used bigger or smaller drive wheels? Academic Skills Required to Complete Lab Tasks English Math Science Social Language Arts Studies Build car. ✓ ✓ ✓ Test car; measure time distance. ✓ ✓ Retest car several times to obtain ✓ ✓ average distance and time. Make changes to car and retest. ✓ ✓ Chapter 22 Transportation Systems 489
23. As the Wheel Turns Play the Game This time machine will Clue 1 travel to the past to show you how the inven- tion of the wheel dramatically changed trans- 3500 B.C.E. The earliest portation. To operate the time machine, you evidence of the wheel comes from the area must know the secret code word. To discover between the Tigris and the code, read the clues, and then answer the Euphrates Rivers in what is questions. now known as Iraq. There, the ancient Sumerians formed wheels from three planks of wood that were bound with leather ties held in place by some Clue 2 copper nails. A hole in the middle 2000 B.C.E. Use of the wheel for held an axle. organized warfare created a demand for something that weighed less and moved faster. Spokes eliminated most of the heavy wood in the center of the wheel. Sculptures from Chinese tombs from the 13th century B.C.E. show spokes on chariot wheels. Clue 4 1845 The wheels on horse-drawn vehicles were covered with a solid, rubber tire. However, solid rubber Clue 3 was hard on roadways and did not produce a comfortable ride. 1800s Heavy railroad cars required In England, Robert W. Thompson sturdy metal wheels that ran along patented the first pneumatic (air- a track. Locomotives in the United filled) tire for use on carriages. States used large driving wheels to help increase speeds to about 30 mph. Some of these wheels were more than six feet in diameter. 490 Unit 7 Transportation Technologies
24. Clue 6 Clue 5 1900 At the turn of the century, the 1888 John Dunlop of use of pneumatic tires spread to auto- Ireland patented a mobiles. Separate inner tubes held pneumatic tire the air, and the for bicycles and outer covering formed a company was made from to manufacture rubber-coated the tires. cotton cloth. Clue 7 1954 The tubeless tire Clue 8 was introduced. These tires permitted higher speeds by 2001 Dean Kamen designed the reducing surface friction. battery-powered Segway Human Transporter. Its two wheels are made of plastic and are surrounded by air-filled tires. Each wheel is powered by its own motor and controlled by a computer. Kamen hopes it will even- tually replace automobiles in crowded cities. On a piece of paper, write the answers to these questions: 1. What is another term for an air-filled tire? 2. Which part of the tire was made from rubber-coated cotton cloth? 3. Name the material from which the earliest wheel was made. 4. In which country was the first pneumatic tire patented? 5. Wheels on horse-drawn vehicles were covered with this material. Now write down the first letter of each answer. Put them together to discover the secret code word! Engines and motors produce this to provide transportation. Unit 7 Technology Time Machine 491 Michael Macor/San Francisco Chronicle/Corbis
25. Advancing Transportation Getting from Place to Place In Unit 7, you learned about the types of engines that make vehicles go. You also looked at transportation systems people use to move in neighborhoods, travel on water, fly through the air, and even rocket into space! The way people get from place to place affects their lives. Think about your own community. If you live in a city, do you have an easy way to get to the country? If you live in the country, do you have an easy way to get to the city? Do you live near an airport? How difficult is it to visit relatives who live in another city? Design for the Future Think about how to improve transportation systems in your community. For example, if you live near a river that is upstream from a city, a system of hovercraft ports every few miles could reduce traffic. This Project In this project, you will research and design a transportation system to meet the future needs of your community. Your Project Tools and Materials Choose a mode of transportation. ✓ Computer Complete the following tasks: ✓ Internet access 1. Design a new system of transportation for ✓ Trade magazines your community. Include time schedules, ✓ Word-processing software seating capacities, and safety procedures. ✓ Presentation software 2. Design it to use a sustainable fuel. ✓ Posterboard 3. Build a model of the transportation system. ✓ Colored markers Write a report. Create a presentation with posters, video, or presentation software. Present your findings to the class. The Academic Skills You’ll Use Communicate effectively. Speak clearly and concisely. Use correct spelling and grammar when taking notes or writing presentations. Think about transportation technology design. English Language Arts NCTE 4 Use written language to communicate effectively. NCTE 12 Use language to accomplish individual purposes. Social Studies NCSS 8 Science, Technology, and Society 492 Unit 7 Transportation Technologies Big Cheese Photo/Jupiter Images
26. Step 1 Choose Your Topic Step 4 Create Your Project You can choose any mode of transportation that Your project should include: interests you. Examples might include: • 1 research project (design, blueprint, • Submarines • Rocketships or model) • Helicopters • Hydrofoils • 1 report • Monorails • Ferries • 1 presentation • Escalators • Aerial Trams Choose something you have used before! Project Checklist Objectives for Your Project Step 2 Do Your Research Visual ✓ Make a poster or slide presentation to Research your project. Your fact-finding may illustrate your project. include a combination of any of these ideas: Presentation ✓ Make a presentation to your class and • Talk to or write to someone in the transporta- discuss what you have learned. tion industry. • Study plans for similar systems. ✓ Turn in research and names from your • What do old and new articles in libraries and interview to your teacher. Web sites say about your topic? • Take a ride on the transportation mode of your choice and write your observations. Step 5 Evaluate Your Presentation Use the library, the Internet, and magazines. In your report and presentation, did you remember to: Step 3 Explore Your Community • Demonstrate your research and preparation? • Present an imaginative solution to a problem? • Visit a power plant that generates power from • Label your designs or test your model? hydroelectric, solar, or wind power. • Use facts and evidence to back your ideas? • Ask local people what kind of innovations they • Engage your audience? would like to see in local transportation. • Speak clearly? Thank everyone who gives you information! Rubrics Go to glencoe.com to the book’s OLC for a printable evaluation form and your academic assessment form. High-Speed Rail French France has been a world leader in high-speed public trans- hello bonjour portation since the 1950s. Later the first TGV (Train à Grande goodbye au revoir Vitesse) was built in 1981. Passengers could ride from Paris to How are Comment Lyon at 186 miles per hour! Today the railway system is so expan- you? allez-vous? sive and effective that some airline services have been discontin- thank you merci? ued. Double-decker cars have been added to the train to handle You’re the many passengers. welcome de rien Critical Thinking Do you think the TGV could succeed in most U.S. regions? Why or why not? Go to glencoe.com to the book’s OLC to learn more and to find resources from The Discovery Channel. Unit 7 Thematic Project 493
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