3B-2 Physical and Chemical Changes

Front

What is a chemical property?

Back

A characteristic of a substance that can only be observed during a chemical reaction, such as flammability or reactivity.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting or freezing.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, such as rusting or digestion.

Front

Give an example of a chemical change.

Back

Examples include burning wood, digesting food, or iron rusting.

Front

Give an example of a physical change.

Back

Examples include melting ice, boiling water, or dissolving sugar in water.

Front

What happens during a chemical change?

Back

A new substance is formed, and the original substances lose their properties.

Front

Is 'food is digested' a physical or chemical change?

Back

Chemical change.

Front

Is 'wood rots' a physical or chemical change?

Back

Chemical change.

Front

What must happen for a change to be classified as chemical?

Back

There must be a new substance created.

Front

True or False: In a physical change, a new substance is formed.

Back

False.