Science 8 final review alberta

When pressure is applied to a liquid, what happens to the spaces between the particles?

• they do not change

• they increase

• they decrease

• they decrease, then stabilize

When preparing instant coffee, granules of coffee are mixed with hot water. Why do the coffee granules dissolve in the hot water?

• They are equally attracted to both themselves and the water.

• They are not attracted to either themselves or the water.

• They are more attracted to each other than to the water.

• They are more attracted to the water particles than to one another.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following does not accurately describe a solid?

• The particles of a solid cannot move around freely.

• The particles that make up solids have enough energy to pull away from one another.

• When poured, some solids will form a pile.

• Solids have a definite volume.

At its boiling point, a liquid becomes a _______________________

• A) gas

• A) liquid

• A) solid

• A) plasma

Tags

NGSS.MS-PS1-4

What is a pure substance?

• A) It is a solid, liquid, or gas that is made up of particles.

• A) It is comprised of two or more types of particles.

• A) It is made up of at least two different types of particles, yet it appears to be one substance.

• A) It is a substance in which all of the particles are identical.

Tags

NGSS.MS-PS1-4

Which of the following defines solubility?

• The amount of solvent that can dissolve in a given amount of solute at a given temperature.

• The amount of solvent that can dissolve in a given amount of solute, regardless of the temperature of the solution.

• The amount of solute that can dissolve in a given amount of solvent, regardless of the temperature of the solution.

• The amount of solute that can dissolve in a given amount of solvent at a given temperature.

1. The viscosity of a liquid ___________________ as it is heated, and ____________________ as it is cooled.

• increases, does not change

• decreases, increases

• decreases, does not change

• increases, decreases

Tags

NGSS.MS-PS1-4

What is a scientific definition for the term "density"?

• the resistance to flow of a substance

• the mass per unit volume of a substance

• the mass of a certain volume of substance

• the amount of buoyant force that a substance possesses

Why does a piece of metal weighing 10 g sink when it is placed in a large container of ethyl alcohol?

• The metal has a greater mass than the ethyl alcohol.

• The attractive forces of the ethyl alcohol are not strong enough to support the metal.

• The metal has a higher density than the ethyl alcohol.

• Liquids are always less dense than solids.

Wearing a life jacket while on a boat can help to save your life if you fall into the water. Why is this the case?

• The life jacket lowers your average density.

• The life jacket raises your average density so it is less than that of water.

• The life jacket is made of high-density materials.

• The life jacket stabilizes your density.