Physical and Chemical Changes

Front

What is a physical change?

Back

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

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is burning wood a physical or chemical change?

Back

Burning wood is a chemical change.

Front

What happens to energy in an exothermic reaction?

Back

In an exothermic reaction, energy is released.

Front

What happens to energy in an endothermic reaction?

Back

In an endothermic reaction, energy is absorbed.

Front

Give an example of a physical change.

Back

An example of a physical change is dissolving sugar in water.

Front

Give an example of a chemical change.

Back

An example of a chemical change is rust forming on iron.

Front

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

Back

A physical change does not create a new substance, while a chemical change does.

Front

What is an indicator of a chemical change?

Back

An indicator of a chemical change can include color change, gas production, or temperature change.