Unit 2: Energy Transfer - Lesson 2 - Part 1

How does heat move?

• from a warmer to a cooler object

• toward a hot object

• from a cooler to a warmer object

• away from a cold object

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This flame is hotter than the air around it. Which of the following describes how the heat will be transferred?

• The heat will flow equally in both directions

• The heat will flow from cold to hot

• The heat will flow from hot to cold

• none of these

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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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What is our primary energy source?

• Electricity

• Food

• Grass

• Sun

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Insulation is used in the walls of a building to ____.

• trap solar energy

• keep thermal energy from moving through the walls

• conduct thermal energy

• keep cold air from moving through the walls

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Why do you want to live in a home with good insulation during the cold winter months?

• If there is good insulation, the thermal energy will not be able to move easily from inside the warm home to the cool areas outside the building.

• The insulation will keep you cool during winter.

• If there is not good insulation, the air inside the home will become too hot.

• A house with good insulation will keep the warm air in the attic.

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What type of material makes the best conductor?

• Food

• Wood

• Styrofoam

• Metal

What type of material makes the best insulators?

• Aluminum

• Copper

• Styrofoam

• Metal

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When a popsicle melts, the particles  _____.

• there are no particles in popsicles

• lose thermal energy and slow down

• gain thermal energy and speed up

• stay the same

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A jacket is a good example of an . . .

• Investigator

• 
  Insider

• Insulator

• Interrogator

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