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In this quiz, various topics of middle school science are asked covering the complete syllabus of grade 8 science. The students will be required to answer different multiple-choice questions and the questions are framed in such wat that students learn the topics effectively.
What is a compound?
Two different elements bonded together.
Two of the same elements bonded together.
A mixture of different substances.
Two substances stuck together with glue.
What is the electron?
a negatively charged particle that orbits the nucleus
a neutral particle found in the nucleus
a positively charged particle found in the nucleus
a neutral particle that orbits the nucleus
What is the chemical symbol for the element mercury?
Hg
Merc
MeC
MY
How do chemical reactions turn substances into new substances?
with burning acid
the molecules mix together and create new substances
the atoms break apart and combine back together in new ways
the ionic compounds mix in water to form solutions
How much force is needed to accelerate a 25kg bowling ball at 2m/s2?
50N
5N
12.5N
100N
A person walks out of a store with a pillow at the top of an overflowing shopping cart. While walking to the car, the cart’s wheel hits a large rock, causing the cart to suddenly stop. The pillow slides forward.
Law of Inertia
Law of Force and Acceleration
Law of Action-Reaction
Where is potential energy at its minimum?
W
X
Y
Z
The temperature scale starting with absolute zero at 0 is the
coldness scale
Kelvin scale
Celsius scale
Fahrenheit scale
When ice sits out on a counter and melts, it is because the ice has...
gained mass
gained energy
lost mass
lost energy
Shorter wave lengths can carry more energy. Which of these probably carries the MOST energy:
Infrared light
X-rays
UV light
Visible light
Which of the following solutions is the most diluted?
A solution of 5 grams of salt with a volume of 100 mL.
A solution of 10 grams of salt with a volume of 1000 mL.
A solution of 20 grams of salt with a volume of 1000 mL.
A solution of 50 grams of salt with a volume of 1000 mL.
Which of the following is in order from the most complex to the simplest?
Cell, tissue, organ, organ system
Tissue, cell, organ system, organ
Organ system, organ, tissue, cell
Organ system, tissue, cell, organ
What happened to the Galapagos finches that were discovered by Charles Darwin?
Charles Darwin never made it to the island. His plane wrecked.
Charles Darwin noticed that even though the birds were the same species, they all looked different from each other.
The birds were dying out because of the weather changes on the island.
The birds looked exactly the same.
Which of the following lists the processes in the order they need to occur, even though there is no start and no end.
pollination, fertilization, seed dispersal, germination
germination, seed dispersal, pollination, fertilization
fertilization, pollination, seed dispersal, germination
germination, fertilization, pollination, seed dispersal
When an offspring grows off from the body of a parent organism it is called __________________.
fragmentation
budding
sporulation
fission
How does carbon dioxide get into plant cells?
absorbed with water through the leaves
taken in through stomata on the underside of leaves
plants do no take in carbon dioxide
absorbed through roots
Deer are introduced into a grassland ecosystem and their population increases considerably. If the deer population continues to grow, which is the most likely outcome for the ecosystem?
Biodiversity would decrease, and sustainability would decrease.
Biodiversity would increase, and sustainability would decrease.
Biodiversity would increase, and sustainability would increase.
Biodiversity would decrease, and sustainability would increase.
An organism that uses sunlight to create its own food is known as a:
Producer
Heterotroph
Consumer
Decomposer
An organism that lives by breaking apart dead organic matter into simpler parts is-
carnivore
decomposer
scavenger
consumer
Some factories that burn coal produce smoke with harmful chemicals, such as sulfur. Scrubbers are devices that are attached to the smokestacks to reduce the amount of sulfur put into the atmosphere. To evaluate the effectiveness of these devices, what data would need to be collected?
The average amount of sulfur in a certain amount of coal
The amount of coal a factory burns each year and how much sulfur it emits (produces)
The amount of sulfur emitted (produced) by a smokestack before and after the scrubber is attached
The increase in the use of scrubbers by factories that burn coal
