Physical and Chemical Changes

Front

True or False: When changing a liquid to a gas thermal energy is added for boiling.

Back

True

Front

What is a change in matter that forms a new substance?

Back

Chemical change

Front

What is another name for a chemical change?

Back

Chemical reaction

Front

If you put a sugar cube into a cup of hot water, what would happen to the sugar over time?

Back

It will dissolve.

Front

What state of matter spreads apart or squeezes together to fit into a space?

Back

Gas

Front

What is a physical change?

Back

A change that does not form a new substance, like melting ice.

Front

What is a chemical change?

Back

A change that results in the formation of new substances, like rusting iron.

Front

What happens to the molecules in a solid when it melts?

Back

They gain energy and move apart.

Front

What is an example of a chemical reaction?

Back

Burning wood.

Front

What is thermal energy?

Back

Energy that comes from heat.