Chemical & Physical Changes

Front

What is a chemical change?

Back

A process where a new substance is formed, often with different properties.

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 are signs of a chemical change?

Back

Production of a gas, change in energy, production of an odor.

Front

What happens in all chemical changes?

Back

A new substance is formed.

Front

What is mass?

Back

The amount of matter in an object.

Front

What happens to ice when it melts?

Back

It undergoes a physical change.

Front

What happens when a glass bottle shatters?

Back

It undergoes a physical change.

Front

Can a chemical change be reversed?

Back

Most chemical changes cannot be easily reversed.

Front

Can a physical change be reversed?

Back

Many physical changes can be reversed, like freezing and melting.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and smoke.