Lesson 3 Heat and Materials

What is Conduction?

• When heat is passed from particle to particle through an object.

• When particles get heated, expand, and become less dense.

• When heat transfers by waves through empty space.

What is Radiation?

• When heat is passed from particle to particle through an object.

• When particles get heated, expand, and become less dense.

• When heat transfers by waves through empty space.

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What is Convection?

• When heat is passed from particle to particle through an object.

• When particles get heated, expand, and become less dense.

• When heat transfers by waves through empty space.

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How does heat move?

• From cooler objects to warmer objects.

• From warmer objects to cooler objects

• From metal objects to nonmetal objects

• Very quickly in all directions

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Suppose that you are at the beach.

Energy from the Sun reaches you mainly through

• conduction

• convection

• radiation

• temperature

George touches a metal spoon is in a hot bowl of soup. It burns his hand.

This is an example of heat transfer by:

• convection

• radiation

• conduction

• temperature transfer

Most of the energy we use on Earth originally came from _____________________.

• the center of the Earth

• the equator

• the sun

• the moon

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Heat is

• the movement of cold particles to warm particles.

• the movement of thermal energy from warmer objects to cooler objects.

• the average kinetic and potential energy of the particles of a substance.

• a way of measuring temperature.

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When you touch something that feels cold, 

• heat from your hand moves into the cold substance.
• coldness moves from the cold substance into your hand.
• it melts.
• it freezes.

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When does thermal energy transfer end?

• it never ends
• both reach the same temperature
• when it starts boiling
• when you measure them

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