Chemical and Physical Changes

Front

What is a chemical change?

Back

A chemical change is when a new substance is made, like when you burn a candle.

Front

What is a physical change?

Back

A physical change is when no new substance is made, like when water turns to ice.

Front

What happens during a chemical change?

Back

Usually two or more materials are combined, and a new substance is formed.

Front

Can chemical changes be easily undone?

Back

Most chemical changes cannot easily be undone.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

What is an indicator of a chemical change?

Back

Bubbles being formed, a change in color, or a change in temperature.

Front

What is a physical change in terms of substance?

Back

In a physical change, objects do not become a different substance.

Front

How can physical changes be reversed?

Back

Physical changes are usually easy to reverse, like evaporating water to get sugar crystals back.

Front

What are the three common states of matter?

Back

Solid, liquid, and gas.

Front

What happens when a substance changes states?

Back

It undergoes a physical change.