Level 5 Chapter 6 Test

1. A student investigated a substance and recorded observations. Based on the observations shown, what can you conclude about the substance?

• It could be a solid or liquid.
• It can only be a gas.
• It can only be a liquid.
• It could be a liquid or a gas.

2. How can radiant energy affect phases of matter?

• It can cause matter to become a liquid or gas.
• It can cause matter to freeze.
• It can cause matter to become a solid.
• It has no effect on matter.

3. Which of the following best defines matter?

• All mixtures and solutions
• Everything except emotions
• Anything that has mass and volume
• Anything you can see with your eyes

4. A student is designing an investigation. Based on the question, which could be a constant in the investigation?

• Amount of chocolate
• Melting temperature
• Brand of chocolate
• Price of chocolate

5. The amount of matter in an object is its -

• length
• mass
• weight
• volume

6. What could best change the solid gold chunks into liquid gold?

• A sharp instrument
• Freezing weather
• Dropping them from a cliff
• Very high temperature

7. It is important for engineers to understand atoms so they can —

• pick the right materials because matter consists of different atoms that have different properties
• know how to calculate the volume of a material
• explain how to build a solution to a problem, such as a bridge or a new road
• understand how to properly label a design plan

8. A solid candy bar has a mass of 18 grams. A student melted the candy bar until it became a liquid. What is the mass of the candy bar as a liquid?

• 9 grams because the mass of a substance reduces by half during a phase change
• 18 grams because the total mass of matter remains the same during a phase change
• 20 grams because a liquid has a slightly higher mass than a solid
• 16 grams because a liquid has a slightly lower mass than a solid

9. Which example of matter in the umbrella shown can be classified as a conductor of thermal energy?

• A
• B
• C

10. When water freezes into ice, its volume increases. What happens to its mass?

• It increases.
• It stays the same.
• It decreases.
• Water has no mass.