Physical and Chemical Changes

Front

What is a chemical change?

Back

A change where one or more new substances are created.

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

Give an example of a physical change.

Back

Curling your hair.

Front

Is hammering wood together a chemical or physical change?

Back

Physical change.

Front

Which of the following is NOT a physical change: crumpled paper, pencil sharpening, shrunken clothing, rust?

Back

Rust.

Front

What happens to the molecules during a chemical change?

Back

The molecules rearrange to form new substances.

Front

What happens to the molecules during a physical change?

Back

The molecules remain the same but may change in form or appearance.

Front

Is melting ice a chemical or physical change?

Back

Physical change.

Front

Is burning wood a chemical or physical change?

Back

Chemical change.

Front

What is an example of a chemical change?

Back

Rusting of iron.