Thermal Energy Transfer

What happens to the thermal energy of hot fudge when it comes into contact with ice cream?

• It remains constant.

• It increases.

• It transfers to the ice cream.

• It disappears.

Answer explanation

According to the 2nd Law of Thermodynamics, thermal energy or heat always transfers from a hotter object to a colder object.

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When the thermal energy from the hot fudge transfers to the ice cream, the ice cream starts to

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Why does a large container of water have more thermal energy than a small cup at the same temperature?

• Because it is made of a different material.

• Because it is colder.

• Because it is hotter.

• Because it is a larger amount of water and has more particles moving around.

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Which scientific law represents the idea that thermal energy (heat) flows from warmer objects to colder objects?

• 1st Law of Thermodynamics

• 2nd Law of Thermodynamics

• Law of Conservation of Energy

• Law of Conservation of Mass

Thermal equilibrium means

• two objects have the same temperature

• two objects have opposite temperatures

• two objects have different temperatures

• two objects increase temperature at the same rate

What happens to a cup of hot coffee left in a room?

• It evaporates immediately.

• It stays the same temperature.

• It heats up.

• It cools down as its thermal energy flows into the room.

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How does a heater warm up a cold room?

• By creating new heat.

• By transferring thermal energy to the room air.

• By absorbing cold air.

• By reducing the room's temperature.

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Why do you feel cold when touching a metal surface, like a can of soda?

• Because the metal is emitting coldness.

• Because the metal is a poor conductor.

• Because thermal energy flows from your hand to the metal.

• Because the metal is absorbing your warmth.

Why does ice melt at room temperature?

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What is the main takeaway about thermal energy transfer?

• It only occurs in liquids.

• It is unpredictable.

• It can only happen in from cold to hot objects.

• It stops once thermal equilibrium is reached.

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