Chemistry Unit 2 Pretest

The ability to burn is known as---

• Flammability

• Combustion

• Density

• Exploding

Mass divided by volume is the formula for calculating----

• Mass

• Volume

• Density

• Matter

Ice melting is an example of a

• physical change
• chemical change
• physical property
• chemical property

Physical properties are

• properties that can be observed without changing the identity of the substance
• properties that describe how a substance changes into a completely different substance
• properties that we can only observe with our eyes
• properties that we need special tools to observe

Which is an example of a chemical change?

• melting ice to make water
• baking cake batter to make a cake
• putting cheese on bread to make a cheese sandwich
• cutting an orange into slices for a snack

______________________ can only be recognized when substances react or do not react chemically with one another.

• Physical properties

• Chemical properties

• Flammable properties

• Colorful properties

Which is an example of a physical property?

• ability to react with acid
•  state of matter
• flammability
• ability to react with oxygen

Which state of matter has molecules that move fastest and spread to fill the space they are in?  They do not form any pattern.

• solid 
• liquid 
• gas

Which of the following is not a chemical property? 

• rusting 
• boiling 
• rotting 
• burning 

What is the measure of how much space an object takes up?

• matter
• volume
• substance
• properties