physical and chemical changes #1

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 cutting.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and includes processes like rusting, burning, and cooking.

Front

Is cutting a log into small pieces a chemical change?

Back

No, cutting a log into small pieces is a physical change.

Front

What is rusting an example of?

Back

Rusting is an example of a chemical change.

Front

What happens when an antacid tablet is placed in water?

Back

When an antacid tablet is placed in water, it undergoes a chemical change, producing bubbles (gas).

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas is a sign that a chemical reaction has occurred.

Front

What type of change is exploding fireworks?

Back

Exploding fireworks is a chemical change.

Front

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

Back

A physical change does not change the substance's chemical identity, while a chemical change results in the formation of new substances.

Front

Can a chemical change be reversed?

Back

Some chemical changes can be reversed through other chemical reactions, but many cannot be easily reversed.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water.