Physical and Chemical Changes

Front

In an endothermic reaction, energy is _________.

Back

absorbed

Front

In an exothermic reaction, energy is _________.

Back

released

Front

Which of the following describes a precipitate?

Back

A solid forms when one liquid is poured into another.

Front

True or False: a physical change may produce a new substance.

Back

False

Front

A precipitate is a ___________ that forms when 2 liquids react together.

Back

solid

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

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

Front

Give an example of a physical change.

Back

Melting ice.

Front

Give an example of a chemical change.

Back

Burning wood.

Front

What happens to energy in an exothermic reaction?

Back

Energy is released into the surroundings.