Unit 1 Test Review

Wood burning is an example of

• physical change

• chemical change

• barbecue

• campfire

Water boiling is an example of

• physical change

• chemical change

• making mac and cheese

How do you know a chemical change is happening?

• boil it

• look at it under a microscope

• pass an electrical current through it

• observe a reaction with another substance

Which of these are ways to separate a mixture? (pick more than one)

• filtration (using a filter)

• evaporation

• magnet

• adding an acid to dissolve it

Calculate the density if the mass is 78.0 grams and the volume is 23 mL.

• 1794 g/mL

• 0.29 g/mL

• 3.39 g/mL

• 101 g/mL

If a fluid fills a 100 mL container and its density is 12 g/mL, what is the mass of the fluid?

• 8.33 g

• 0.12 g

• 112 g

• 1200 g

When you use the triangle trick for density, which variable goes at the top of the triangle?

• density

• mass

• volume

• dino chicken nuggets

The mass of a certain amount of matter divided by volume is which physical property?

• force

• density

• specific gravity

• specific heat

What happens to the density of water when you add salt to it?

• the density increases

• the density decreases

• the density does not change

• the density cannot be determined

Air is an example of

• solid

• liquid

• gas

• plasma