Physical and Chemical Changes

Why is the below picture an example of a physical change?

• The pencil is a different color

• The materials making up the pencil did not change

• It is no longer a pencil

• A new substance was made

Frank has a paper clip. It has a mass of 9g and a volume of 3cm³. What is its density?

• 3 g/cm³
• 1/4 g/cm³

• 27 g/cm³
• 39 g/cm³

Properties that describe how a substance looks, feels, state of matter, etc. are?

• Physical Properties

• Chemical Properties

Evaporating Water

• Chemical

• Physical

Bubbles form when two or more substances are combined ...

• Chemical Change
• Physical Change

Is squeezing an orange a chemical or physical change?

• Chemical because a new substance was created

• Physical because you are just changing the shape.

All these are examples of a chemical change EXCEPT....

• Rusting metal

• Boiling water

• Burning paper

• Rotting food.

Chewing food is an example of _____________.

• chemical digestion
• physical digestion

What is the formula for density?

• density = mass x volume
• density = mass / volume
• density = mass + volume
• density = mass - volume

Breaking food down with the use of enzymes is known as:

• Chemical Digestion
• Physical Digestion