Evidence of a chemical change

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is a physical change?

Back

A change that does not result in the formation of new substances.

Front

Are fireworks exploding a physical or chemical change?

Back

Chemical change.

Front

What is one sign that a chemical reaction has occurred?

Back

Formation of a gas.

Front

Which of the following is NOT evidence of a chemical change? Breaking, Unexpected color change, Gas produced, Temperature change (with no outside heat added)

Back

Breaking.

Front

What happens when iron rusts?

Back

It undergoes a chemical change.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an unexpected color change an indication of?

Back

It can indicate a chemical change.

Front

What is the role of heat in a chemical change?

Back

Heat can be absorbed or released during a chemical change.

Front

What is an example of a gas being produced in a chemical reaction?

Back

Baking soda reacting with vinegar.