Physical Science Unit

Which of the following contains particles that will settle out over time?

• a colloid

• a solution

• a suspension

• All of these contain particles that will settle out over time.

The Tyndall effect is used to identify __________.

• colloids

• compounds

• solutions

• suspensions

Which of the following mixtures has uniformly distributed particles dissolved throughout?

• a colloid

• a compound

• a solution

• a suspension

Identify the solute(s) in the atmosphere.

• carbon dioxide

• oxygen

• nitrogen

• oxygen and carbon dioxide

Stirring increases the __________ of a salt in water.

• rate of dissolving

• solubility

• both the rate of dissolving and the solubility

• neither the rate of dissolving nor the solubility

Which method of separation would most likely be used to remove allergens from the air in your house?

• distillation

• evaporation

• filtration

• magnetism

Distillation is typically used to separate __________.

• a solid from a liquid

• gases with different concentrations

• liquids with different boiling points

• solids with different densities

The term dilute describes a solution with __________ amount of solute.

• no

• a relatively low

• a relatively large

• a maximum

Percent by mass is a measure of a solution’s __________.

• concentration

• density

• molarity

• volume

Percent by mass is a comparison of the mass of the solute with the __________.

• mass of the solution

• mass of the solvent

• molarity of the solution

• volume of the solvent