Lesson check unit 2 lesson 3

What happens when you heat crayons?

• they will freeze

• they will change from solid to liquid

• they will change from liquid to solid

Which material will freeze when you cool it?

• a plastic milk carton

• a glass milk bottle

• milk in a glass

Hector cooked some vegetables on a stove.

The vegetables became soft and brown.

What was the effect of cooking on the vegetables?

• The vegetables turned from liquid to solid.

• The color and the texture of the vegetables changed.

• The vegetables turned black and changed into ashes.

Look at the snow and wax. What patterns do you see?

• The materials changed from liquid to solid.

• The materials changed from solid to liquid.

• The materials turned black and changed into ashes.

Elizabeth places juice in a freezer.

The next day she observes that the juice is frozen.

What evidence does Elizabeth have to make the argument that the juice froze?

• The juice changed from liquid to solid.

• The juice changed from solid to liquid.

• The juice changed in color only.

What happens when heat is added to wax? Choose all true statements.

• It melts.

• It changes from solid to liquid.

• It changes to ashes.

• a liquid

What does burning cause wood to turn into?

• ice

• a liquid

• black ashes

What would happen to a plastic bag if you put it into the freezer?

• The bag would change to ashes.

• The bag would change to a liquid.

• The bag would stay solid.

Chefs use math and science every day in their work.

• true

• false