Thermal Energy Transfer

The total energy of all the particles in a substance is called

• temperature

• thermal energy

• degrees

• mass

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Heat transfer occurs

• in many directions

• both from warm objects to colder ones and from cold objects to warmer ones

• only from warm objects to colder ones

• only from cold objects to warmer ones

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A measure of the average kinetic energy of the individual particles in an object is called

• thermal energy

• conduction

• convection

• temperature

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What happens to particles as they heat up?

• They slow down
• Nothing
• They don't move
• They speed up

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What happens to particles as they cool down?

• They slow down
• Nothing
• They don't move
• They speed up

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As you touch a hot stove the heat transfers -

• from your hand to the stove
• from the stove to your hand
• It doesn't transfer

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Hot objects begin to cool as-

• cooler air is transferred to the hot object.
• thermal energy in the object is transferred to the surrounding air.
• atoms in the object react with the oxygen in the air.
• thermal energy in the object cancels out energy in the air

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NGSS.HS-PS3-4

Which sentence explains why a cold metal spoon placed in a pot of boiling water becomes hot?

• Thermal energy is transferred from the spoon to the water.

• Thermal energy is transferred from the water to the spoon.

• Thermal energy in the water is transformed into potential energy in the spoon.

• Thermal energy in the spoon is transformed into potential energy in the water.

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NGSS.HS-PS3-4

Conduction can only occur between two objects when –

• one object is less dense than the other.
• both objects are in physical contact with each other.
• one of the objects is made of a metal.
• both objects are exactly the same temperature.

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NGSS.HS-PS3-4

Radiation is a method of thermal energy transfer that moves -

• through empty space.
• when objects touch.
• only through solids.
• in the motion of fluids.

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