Unit 1 quiz review

How many significant figures does the following number have: 0.002040

• 6
• 4
• 3
• 2

How many significant figures does the following number have: 0.998005

• 9
• 10
• 6
• 5

Round 0.010229 to four sig figs

• 1022
• 1023
• 0.01023
• 0.01022

Round 1047.78 to three sig figs

• 104
• 105
• 1050
• 1050.00

The ability to burn is known as---

• Flammability

• Combustion

• Density

• Exploding

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

• Mass

• Volume

• Density

• Matter

Reactivity (bubbling, fizzing) is a --- property.

• Chemical

• Physical

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