Science Unit 8

If you cut a stick of butter in half which statement is true about the butter?

• it has changed state

• it has a different taste

• it has kept its shape

• it has different physical properties

If you use soap and water to remove oil from your hands what happens?

• oil sticks to your hands

• oil changes to a solid

• the soap breaks up the oil into smaller drops

• The oil, water,and soap would form a solution

What is true about mixtures and solutions?

• all solutions contain two types of matter

• All mixtures are two types of matter

• all solutions are mixtures

• all mixtures are solutions

Which is an example of a chemical change?

• freezing

• rusting

• mixing

• melting

Air is 80 percent nitrogen and 20 percent oxygen. What is true?

• oxygen is a solvent

• Nitrogen is a solvent

• neither one isa solvent

• the two gases can melt

If you toast an Eggo waffle which shows that chemical changes have taken place?

• size and color

• odor and size

• color and odor

• shape and color

If you freeze juice to make popsicles, how many many physical changes too place by the time they are frozen?

• 1

• 2

• 3

• 4

what physical changes is happening when an ice cube melts?

• heat energy coming from the ice cube to the air

• heat energy moving from the air to the ice cube

• heat energy causing freezing

• heat energy moving between the ice cubes

What tool would you use to find the mass of a rock?

• cylinder

• microscope

• spring scale

• a pan balance

When a sterling silver spoon tarnishes what kind of change happened?

• a chemical change

• a matter change

• a physical change

• a property change