Physical & 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. Examples include changes in state (like melting or freezing) and changes in shape or size.

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 the rearrangement of atoms. Examples include rusting, burning, and digestion.

Front

Is slicing a pellet of sodium a physical or chemical change?

Back

Physical Change

Front

What happens to ice cream when it melts?

Back

It undergoes a physical change.

Front

What is an example of a chemical change involving lithium?

Back

Lithium reacting with water is an example of a chemical change.

Front

What occurs during the digestion of food?

Back

Digestion is a chemical change where food is broken down into simpler substances.

Front

What is an example of a physical change involving ice?

Back

Ice melting into water is a physical change.

Front

What happens when a marshmallow is roasted?

Back

Roasting a marshmallow is a chemical change due to the formation of new substances.

Front

Can physical changes be reversed?

Back

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

Front

Can chemical changes be reversed?

Back

Chemical changes are usually not reversible by simple physical means.