10.2 Thermal Energy Questions

What is thermal energy?

• The total internal energy of all the molecules of a substance.

• The energy stored in the nucleus of an atom.

• The energy due to an object's position.

• The energy released during a chemical reaction.

Tags

NGSS.HS-PS3-4

What is the SI unit for thermal energy?

• Joules [J]

• Calories [cal]

• Watts [W]

• Newtons [N]

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NGSS.HS-PS3-4

Which two factors does thermal energy depend on?

• Temperature and mass

• Volume and density

• Pressure and volume

• Density and temperature

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NGSS.HS-PS3-4

Explain, using reasoning, why liquid water has more energy per molecule than ice when both have the same mass.

• Because liquid water molecules are heavier

• Because liquid water has a higher temperature, so each molecule has more energy

• Because ice molecules are larger

• Because ice is denser than water

Tags

NGSS.MS-PS1-4

What is the definition of heat (Q) as described in the material?

• The energy stored in an object due to its position

• The thermal energy that is transferred between objects when at different temperatures

• The energy required to move an object

• The energy produced by chemical reactions

Tags

NGSS.HS-PS3-4

What is the SI unit for measuring heat (Q)?

• Kelvin [K]

• Newton [N]

• Joules [J]

• Watt [W]

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NGSS.HS-PS3-4

What happens when two objects at different temperatures come into contact?

• Heat transfers from the object with higher temperature to the object with lower temperature until thermal equilibrium is reached.

• Heat transfers from the object with lower temperature to the object with higher temperature until thermal equilibrium is reached.

• Both objects remain at their initial temperatures.

• The object with lower temperature becomes colder.

Tags

NGSS.HS-PS3-4

Where will the equilibrium temperature be in relation to the initial temperatures of two objects?

• It will be higher than both initial temperatures.

• It will be lower than both initial temperatures.

• It will be between the initial temperatures of the objects.

• It will be equal to the initial temperature of the hotter object.

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NGSS.HS-PS3-4

A metal block at 80°C is placed in contact with another block at 20°C. Predict what will happen to their temperatures over time.

• Both blocks will eventually reach 80°C.

• Both blocks will eventually reach 20°C.

• Both blocks will reach a temperature between 20°C and 80°C.

• The temperatures will not change.

Tags

NGSS.HS-PS3-4

What does temperature measure in a substance?

• The average kinetic energy of molecules

• The total energy of molecules

• The amount of energy transferred between objects

• The number of molecules in a substance