Physical and 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 melting, freezing, and dissolving.

Front

What is a chemical change?

Back

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

Front

Is melting a chocolate bar a physical or chemical change?

Back

Melting a chocolate bar is a physical change.

Front

What happens to the molecules during a physical change?

Back

During a physical change, the molecules may change their arrangement or state (solid, liquid, gas) but their chemical structure remains the same.

Front

Is cooking pancakes a physical or chemical change?

Back

Cooking pancakes is a physical change.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood, which produces ash and smoke.

Front

Is freezing juice a physical or chemical change?

Back

Freezing juice is a physical change.

Front

What happens to the properties of a substance during a chemical change?

Back

During a chemical change, the properties of the original substance change, and new substances with different properties are formed.

Front

Is inflating a tire a physical or chemical change?

Back

Inflating a tire is a physical change.

Front

What is an example of a physical change?

Back

An example of a physical change is hammering wood to build a treehouse.