Matter!

Select ALL of the characteristics that describe a physical change.

• substances change in appearance only

• a new substance is not created

• heat is consumed or expelled

• burning and fire are present

• chemical bonds are not created or broken

Cutting your hair is an example of a ___________ change.

• physical

• chemical

Which of the following are examples of chemical properties? (2)

• ability to combust

• reacts with water and oxygen

• is ductile

• is weighed in grams

A new substance is formed in a physical change.

• true

• false

Phase changes are classified as ____ changes.

• Physical

• Chemical

This is an example of a _________ change.

• Physical

• Chemical

This is an example of a _______ change.

• Physical

• Chemical

An element is

• anything that takes up space

• a substance made up of atoms of only one kind

• two or more different elements in exact proportion

A substance that can be physically separated is classified as a(n) _________

• element
• molecule
• compound 
• mixture

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2