Thermal Energy

Which of the following best describes a vacuum?

• Hot
• Cold
• Shiny
• Empty

True or False? Thermal energy (heat) always moves from objects that have high temperature to objects that have a low temperature (HOT --> COLD).

• True
• False

Tags

NGSS.MS-PS1-4

Which takes up the most space?

• A cube of steel at absolute zero
• A cube of steel at 0 degrees Celsius
• A cube of steel at 50 degrees Celsius
• A cube of steel at 100 degrees Celsius

Tags

NGSS.MS-PS1-4

Which has the largest volume?

• A cube of steel at absolute zero
• A cube of steel at 0 degrees Celsius
• A cube of steel at 50 degrees Celsius
• A cube of steel at 100 degrees Celsius

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Why is there more heat in an iceberg than in a pot of boiling water?

• The pot insulates the heated molecules.

• Most icebergs are fairly warm.

• Icebergs contain more molecules

• Water does not hold heat very well, so the boiling water cools faster

Tags

NGSS.MS-PS1-4

Convection currents occur:
(a)  

• In both liquids and gases
• Only in liquids
• When a dense substance is warmer than a less dense substance
• Weakly in solids

Tags

NGSS.MS-ESS2-4

What happens to molecules when the temperature reaches absolute zero?

• They move so fast that they can't be observed.
• They begin to vibrate slowly.
• All of their motion stops completely.
• They form bonds with other, nearby molecules.

Tags

NGSS.MS-PS1-4

What happens inside a thermometer when the temperature goes up?

• The heat causes the liquid to become denser.
• The heat causes the liquid to expand.
• The heat causes the liquid to float.
• The heat boils the liquid into a gas.

Tags

NGSS.MS-PS1-4

Why does warm air rise?

• Because it's less dense than cold air.
• Because it's more massive than cold air.
• Because it has a smaller volume than cold air.
• Because it has more energy than cold air.

Tags

NGSS.MS-ESS2-6

Which of the following best describes temperature?

• Number of molecules
• Motion of molecules
• Size of molecules
• Type of molecules

Tags

NGSS.MS-PS1-4