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 hammering wood.

Front

What is a chemical change?

Back

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

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is rusting of iron a physical or chemical change?

Back

Rusting of iron is a chemical change.

Front

What happens during a physical change?

Back

During a physical change, the form of a substance changes, but its chemical identity remains the same.

Front

What happens during a chemical change?

Back

During a chemical change, the substances involved undergo a transformation that changes their chemical structure, resulting in new substances.

Front

Is cooking an egg a physical or chemical change?

Back

Cooking an egg is a chemical change.

Front

Is dissolving sugar in water a physical or chemical change?

Back

Dissolving sugar in water is a physical change.

Front

What is an example of a chemical change in nature?

Back

Photosynthesis in plants is an example of a chemical change in nature.

Front

Is breaking a glass a physical or chemical change?

Back

Breaking a glass is a physical change.