Unit 1: Density, KMT, Gas Laws, and Weather

What is not true about the volume of a gas compared to liquids and solids?

• The volume of a gas is about 10 times greater than that occupied by an equal number of particles in the liquid or solid state.

• Gases have a definite volume and shape like solids.

• The volume of a gas can change significantly with temperature and pressure.

• Gases are less dense than liquids and solids.

What is the significance of the absolute zero temperature?

• It is the temperature at which all molecular motion ceases and a gas has zero volume.

• It is the temperature at which water freezes.

• It is the temperature at which a gas has maximum kinetic energy.

• It is the temperature at which gases can be compressed indefinitely.

If the absolute (Kelvin) temperature of a gas is tripled, what happens to its volume?

• The volume will be 3 times what it was originally.

• The volume will be halved.

• The volume will remain the same.

• The volume will double.

What is the definition of density?

• Density is the mass of an object divided by its volume.

• Density is the weight of an object multiplied by its volume.

• Density is the volume of an object divided by its mass.

• Density is the mass of an object plus its volume.

What causes gas pressure?

• Gas molecules colliding with surfaces.

• The weight of the gas itself.

• The temperature of the gas being too high.

• The volume of the gas being too low.

What is the Kinetic Molecular Theory (KMT)?

• A theory that explains the behavior of solids in terms of particles in constant motion.

• A theory that explains the behavior of liquids in terms of particles in constant motion.

• A theory that explains the behavior of gases in terms of particles in constant motion.

• A theory that explains the behavior of plasma in terms of particles at rest.

What is Boyle's Law?

• Boyle's Law states that the pressure of a gas is inversely proportional to its volume at constant temperature.

• Boyle's Law states that the volume of a gas is directly proportional to its pressure at constant temperature.

• Boyle's Law states that the pressure of a gas is directly proportional to its temperature at constant volume.

• Boyle's Law states that the volume of a gas is inversely proportional to its temperature at constant pressure.

How does temperature affect the volume of a gas according to Charles's Law?

• As temperature increases, the volume of a gas increases, provided pressure is constant.

• As temperature decreases, the volume of a gas increases, provided pressure is constant.

• Temperature has no effect on the volume of a gas according to Charles's Law.

• As temperature increases, the volume of a gas decreases, provided pressure is constant.

Which of the following is true about the behavior of gases?

• Gases have a definite shape and volume.

• Gases are compressible and expand to fill their container.

• Gases do not exert pressure on their surroundings.

• All of the above.

What is the effect of altitude on atmospheric pressure?

• Atmospheric pressure increases with increasing altitude.

• Atmospheric pressure remains constant regardless of altitude.

• Atmospheric pressure decreases with increasing altitude.

• Atmospheric pressure fluctuates randomly with altitude.