Physical and Chemical Changes

Front

What is a physical change?

Back

A change in the size, shape, or state of matter without altering its chemical composition.

Front

What is a chemical change?

Back

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

Front

Is breaking glass a physical or chemical change?

Back

Physical change.

Front

What happens to wood when it burns?

Back

It undergoes a chemical change, producing heat and ashes.

Front

Is milk going sour a physical or chemical change?

Back

Chemical change.

Front

What is an example of a physical change?

Back

An ice pack getting cold after being placed in the freezer.

Front

What is an example of a chemical change?

Back

Rust forming on iron.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not change the substance's chemical identity, while chemical changes do.

Front

Can physical changes be reversed?

Back

Many physical changes can be reversed, such as melting and freezing.

Front

Can chemical changes be reversed?

Back

Chemical changes are usually not reversible by simple physical means.