Chemical and Physical 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. Examples include melting, freezing, and shredding.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning wood, rusting iron, and baking a cake.

Front

What happens to the weight of matter during a physical change?

Back

The weight of matter stays the same during a physical change.

Front

What happens in all chemical changes?

Back

In all chemical changes, a new substance is formed.

Front

Is melting ice a chemical or physical change?

Back

Melting ice is a physical change.

Front

Is burning wood a chemical or physical change?

Back

Burning wood is a chemical change.

Front

What is an example of a physical change?

Back

Shredding a piece of paper is an example of a physical change.

Front

What is an example of a chemical change?

Back

Rusting of iron is an example of a chemical change.

Front

What are some signs of a chemical change?

Back

Signs of a chemical change include color change, gas production (bubbles), temperature change, and formation of a precipitate.

Front

Can a physical change be reversed?

Back

Yes, many physical changes can be reversed, such as freezing and melting.