Physical and Chemical Changes

An ice pack getting cold after you put it in the freezer for an hour is a

• chemical Change

• physical Change

Burning wood is a

• chemical change

• physical change

Which phrase most accurately describes a chemical change?

• A change on the molecular level.

• A change in appearance.

• A change in taste.

• A change in size.

Describes how matter reacts with other matter. Examples: flammability and toxicity.

• physical properties

• chemical properties

Which of the following is NOT an example of chemical change?

• sour milk

• burning wood

• breaking a pencil

• rust

A teacher is demonstrating physical and chemical changes to her class. Which action should she use to demonstrate a chemical change?

• cutting a piece of paper

• folding a piece of paper

• tearing a piece of paper

• burning a piece of paper

What is an example of a chemical change that happens inside your body?

• Food being broken down by acids in your stomach.

• Food being broken down into small pieces by your teeth.

• Food being moved to your stomach.

• Water being absorbed inside your large intestine.

A change in which NEW substances are formed.

• Chemical change

• Physical change

Salt dissolved in water is a

• physical change

• chemical change

Which of the following is NOT an example of a physical change?

• crumpling paper

• sharpening a pencil

• clothes shrinking

• sour milk