Physical and Chemical Changes

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 is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What are some signs of a chemical change?

Back

Signs include color change, temperature change, formation of a gas, and formation of a precipitate.

Front

What is a chemical property?

Back

The ability of a substance to undergo a chemical change and form new substances.

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing the substance's identity.

Front

Is melting ice a physical or chemical change?

Back

Physical change.

Front

Is burning wood a physical or chemical change?

Back

Chemical change.

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Front

What happens to the molecules during a chemical change?

Back

The molecules rearrange to form new substances.

Front

What is an example of a physical change?

Back

Dissolving sugar in water.