Unit 24 Assessment

Water evaporates when you add

• heat
• air
• salt
• sugar

What state of matter is ice?

In a chemical change, a new substance is

• created
• mixed
• dissolved
• cut

Mixing salt and water creates a

• chemical
• solution
• mixture
• drink

What is a physical change?

• A. Burning wood
• B. Melting ice
• C. Rusting iron
• D. Cooking an egg

Which of the following is a mixture?

• A. Pure water
• B. Trail mix
• C. Gold bar
• D. Sugar cube

What happens to particles in a solid compared to a gas? (Choose 2)

• A. They are close together in a gas
• B. They move freely in a solid
• C. They are tightly packed in a solid
• D. They have no definite shape in a gas

What is the process of a liquid changing into a gas called?

• A. Melting
• B. Freezing
• C. Condensation
• D. Evaporation

Something that takes up space and has mass is called:

• matter
• volume
• density
• mass

Explain the difference between a physical change and a chemical change