Unit 5 – Chemical & Physical Changes Vocabulary Practice

Front

What are chemical reactions that absorb heat called?

Back

Endothermic

Front

What best describes a catalyst?

Back

A substance that increases the rate of chemical reactions.

Front

What is a chemical change?

Back

A change that occurs when one or more substances change into entirely new substances.

Front

Which of these is a physical property?

Back

Hardness.

Front

What is a precipitate?

Back

A solid that falls out of a solution.

Front

What are chemical reactions that release heat called?

Back

Exothermic.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change affects the form of a substance, while a chemical change results in the formation of new substances.

Front

What is an example of a physical change?

Back

Melting ice.

Front

What is an example of a chemical change?

Back

Burning wood.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.