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. It involves a chemical reaction and includes processes like burning, rusting, and cooking.

Front

Give an example of a physical change.

Back

Melting ice is an example of a physical change.

Front

Give an example of a chemical change.

Back

Wood burning is an example of a chemical change.

Front

What happens to the substances in a chemical change?

Back

In a chemical change, the original substances are transformed into new substances with different properties.

Front

Is dissolving salt in water a physical or chemical change?

Back

Dissolving salt in water is a physical change.

Front

What is an indicator of a chemical change?

Back

An indicator of a chemical change can include color change, temperature change, gas production, or the formation of a precipitate.

Front

Is frying an egg a physical or chemical change?

Back

Frying an egg 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 chemical composition of a substance, while a chemical change results in the formation of new substances.

Front

What is an example of a chemical change that occurs in everyday life?

Back

Burning coal is an example of a chemical change that occurs in everyday life.