10.1 Temperature Questions

What does temperature (T) measure in a substance?

• The total mass of the substance

• The average kinetic energy of the molecules

• The volume of the substance

• The density of the substance

What does "twice as hot" mean in terms of the molecules' kinetic energy?

• The molecules have twice the average kinetic energy.

• The molecules move half as fast.

• The molecules have the same kinetic energy.

• The molecules have no kinetic energy.

Tags

NGSS.HS-PS3-2

Explain why the Kelvin scale is used in scientific measurements involving kinetic energy.

• Because it is proportional to the kinetic energy of molecules.

• Because it starts at the freezing point of water.

• Because it is easier to read than other scales.

• Because it is used only in the United States.

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NGSS.HS-PS3-2

NGSS.HS-PS3-4

Why is temperature on the Kelvin scale not measured in degrees?

• Because it is a measure of mass

• Because it is a direct measure of average kinetic energy

• Because it is used only in cooking

• Because it is always negative

Why is 0 K considered the lowest possible temperature?

• Because it is where molecules have the least kinetic energy and are not moving

• Because it is the freezing point of water

• Because it is the boiling point of water

• Because it is the average temperature of space

Tags

NGSS.HS-PS3-2

What is thermal equilibrium?

• When two objects are at the same temperature.

• When two objects are at different temperatures.

• When two objects have different masses.

• When two objects are moving at the same speed.

Tags

NGSS.HS-PS3-4

Which of the following best describes the process that leads to thermal equilibrium between two objects?

• The objects exchange energy (heat) until they reach the same temperature.

• The objects exchange mass until they are equal.

• The objects stop interacting with each other.

• The objects change color to match each other.

Tags

NGSS.HS-PS3-4

Explain the relationship between temperature and the average kinetic energy of a liquid’s molecules.

• As temperature increases, average kinetic energy decreases.

• As temperature decreases, average kinetic energy decreases.

• Temperature and average kinetic energy are not related.

• As temperature decreases, average kinetic energy increases.