Physical vs Chemical Changes

Front

What is a physical change?

Back

A change that occurs but does not result in the formation of a new substance.

Front

What is a chemical change?

Back

A change that occurs when two or more substances react to form a new substance.

Front

Example of a physical change?

Back

Sharpening a pencil.

Front

Example of a chemical change?

Back

Burning wood.

Front

What happens during a chemical change?

Back

The original substances are transformed into one or more new substances.

Front

What is an indication of a chemical change?

Back

Burning, rusting, or fizzing.

Front

What is an indication of a physical change?

Back

Changes in state, such as melting or freezing.

Front

Is dissolving sugar in water a physical or chemical change?

Back

Physical change.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not create new substances, while chemical changes do.

Front

What happens to the mass of substances during a chemical change?

Back

The mass is conserved; it remains the same before and after the change.