Science G2-U11 Review

What can cause a chemical change in matter?

• wetting and drying

• bending and folding

• melting and freezing

• heating and burning

What happen to water vapor when it settles on cool objects?

• It dissolves in a solution.

• It condenses into drops of water.

• It evaporates into the air.

• It combines to form a mixture.

What can help to separate matter in a solution?

• condensation

• melting

• evaporation

• freezing

Which is an example of physical change?

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Which are clues a chemical change is happening?

• seeing and feeling heat

• seeing matter change in shape

• seeing light and feeling heat

• seeing matter change in size

Why do drops form on the sides of a cold glass?

• Water is freezing.

• Water is evaporating.

• Ice is melting.

• Vapor is condensing.

What happens when matter changes in size or shape only?

• a chemical change

• a slow change

• a rapid change

• a physical change

How can you tell when a chemical change has happened?

• Matter change from a liquid to a gas.

• Matter turns into different matter.

• Matter grows larger or smaller.

• Matter change from a liquid to a solid.

How can salt be separated from ocean water?

• by freezing the water

• by melting the salt

• by boiling the water

• by cooling the salt

Which of these is a physical change?

• cheese melting

• apples rotting

• a cake baking

• toasting  burning