The Complete Middle School Science Quiz

Select the correct chemical formula for the given molecule.

This passage describes a chemical reaction. Read the passage. Then, follow the instructions below.

Gasoline provides the energy that powers many car engines. In an engine, gasoline and oxygen are mixed together and burned, creating carbon dioxide gas and water vapor. This process releases energy that the engine uses to turn the wheels, making the car move.

Complete the sentence.

In this chemical reaction, oxygen is a ##reactant##

A skydiver fell directly toward Earth at a constant velocity for 1.5 seconds. He fell 87 meters in that time. What was his velocity?

##58## meters per second directly towards earth

 Find out the distance covered when speed is 60 km/hour and time is 2 hours. 

Read the text about an object in motion.

Elena was walking with a helium balloon when the balloon's string slipped out of her hand. The balloon floated toward the sky.

Complete the statement. Assume that the balloon's mass did not change.

As the balloon floated towards the sky, the gravitational potential energy between the balloon and Earth ##increased##.

The mass, speed, and kinetic energy of the two boys are given below.

Complete the sentence using the given table.

Sam’s mass is ##half## of Thomas.

The diagram below shows a solution with one solute. Each solute particle is represented by a purple ball. The solution fills a closed container that is divided in half by a membrane. The membrane, represented by a dotted line, is permeable to the solute particles.

The diagram shows how the solution can change over time during the process of diffusion.

Complete the text to describe the diagram.

Solute particles moved in both directions across the permeable membrane. But more solute particles moved across the membrane _______________________________. When there was an equal concentration on both sides, the particles reached equilibrium.

Select the part whose main job is to control which substances enter and leave a plant cell.

Select the part whose main job is to sort and package proteins and other substances in a plant cell.

Select the part whose main job is to store nutrients, water, and waste in an animal cell.

Read the description of a trait.

William has freckles.

What information supports the conclusion that William inherited this trait?

All organisms inherit certain traits from their parents. Information about these inherited traits is found in genes. Genes are pieces of hereditary material that are passed from parents to offspring. An organism's genes affect its inherited traits.

Which of the following statements are true? Select all that apply.

In a group of summer squash plants, some individuals have fuzzy leaves and others have smooth leaves. In this group, the gene for the leaf texture trait has two alleles. The allele L is for fuzzy leaves, and the allele l is for smooth leaves.

A certain summer squash plant from this group has fuzzy leaves. This plant has two alleles for fuzzy leaves.

Based on this information, what is this summer squash plant's phenotype for the leaf texture trait?

What type of rock is formed from rocks that have melted (magma) and then cooled?

 What type of rock is shown in this photo?