Sci 8 Final Exam Review Unit 1 and 2

Which of the following is the best example of a mechanical mixture?

• Salt dissolved in water

• Oil and vinegar salad dressing

• Air

• Sugar in tea

What is the term for a solution that cannot dissolve any more solute at a given temperature?

• Dilute

• Saturated

• Concentrated

• Supersaturated

Why does a cold soda appear to sweat on a hot day?

• The soda is evaporating

• The gas inside is condensing

• Water vapor condenses on the cold can

• The can is leaking

Which of the following will decrease the rate at which a solid solute dissolves in a liquid?

• Stirring the solution

• Increasing temperature

• Crushing the solute

• Using colder water

Viscosity describes:

• The taste of a substance

• The ability of a fluid to flow

• The solubility of a mixture

• The density of an object

Which process is used to separate a solid that has dissolved in a liquid?

• Filtration

• Decanting

• Evaporation

• Magnetic separation

A liquid with high viscosity will:

• Flow quickly

• Have a strong smell

• Flow slowly

• Be more dense

Which of the following is not a method of measuring concentration?

• g/mL

• g/L

• mL/g

• % (percent)

A submarine needs to adjust its density to rise to the surface. It should:

• Fill its ballast tanks with water

• Increase its volume

• Empty its ballast tanks

• Increase its mass

Which state of matter has the least particle movement?

• Solid

• Liquid

• Gas

• Plasma