Physical and Chemical Changes

Which could you use to separate a mixture of sugar and water?

• density
• evaporation
• filtering
• magnetism

Which of the following actions will NOT help you separate a mixture?

• heating
• straining
• cutting
• evaporating

Which of the following actions will NOT help you separate a mixture?

• heating
• straining
• cutting
• evaporating

Which of the following is a physical change?

• An apple rots after several weeks of laying on the ground.
• A campfire burns to keep the campers warm.
• Cookies are baking in the oven.
• Ice melts on a hot day.

Patti drew this image to show particles of a gas. Her sketch of a liquid should show particles that

• look larger.
• move faster.
• form a star-shaped pattern.
• are closer together.

Which of the following is NOT a physical change that happens when water changes state?

• water boils
• water freezes
• ice sinks
• ice melts

As ice melts into liquid water, its temperature

• increases.
• decreases.
• stays the same.
• varies with the environment.

You put some water in trays in the freezer. Soon, you have ice cubes. What happens to the tiny particles of water as the water changes to ice?

• They all move in different directions.
• They move more slowly.
• They move faster.
• They move only in one direction.

The physical changes in the state of water are a

• physical change
• chemical change

The physical changes in the state of water are caused by

• changes in volume
• changes in mass
• changes in temperature