NJSLA Review Homework 10

What is the big idea about thermal energy transfer?

• It is the movement of thermal energy from one object to another.

• It is the creation of energy from nothing.

• It is the destruction of energy.

• It is the conversion of thermal energy to sound energy.

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What happens to your nose when you go outside in low temperatures?

• It gets warmer

• It stays the same

• It gets colder

• It changes color

Fill in the blank: Everything, including extremely cold things like ice, has ________ energy.

• thermal

• kinetic

• potential

• chemical

THINK ABOUT IT: Everything has a temperature that can be measured, so does that mean that everything contains heat? What about extremely cold things?

• Yes, everything contains heat.

• No, extremely cold things do not contain heat.

• Only objects above a certain temperature contain heat.

• Heat and temperature are not related.

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If you designed gear for an outdoor recreation company, what type of heat transfer would you need to factor into your designs?

• Conduction

• Convection

• Radiation

• All of the above

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How can thermal energy transfer affect the weather?

• It can cause changes in temperature and precipitation patterns.

• It has no effect on the weather.

• It only affects the weather in tropical regions.

• It only affects the weather during the summer.

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Which of the following is a good conductor of thermal energy?

• Metal

• Polystyrene

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How is this possible?

• The large surface area of the Space Blanket discourages heat transfer.

• The sheet is thin, so it is more difficult for heat to transfer through it.

• The reflective surface reflects body heat back to the user.

• Aluminum is a great insulator, just like wool.

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Your task is to build a solar oven, meaning an oven that will cook food using only the power of the sun and your knowledge of heat transfer. You have aluminum foil, black paper, and polystyrene foam. You must use all the materials. Which configuration would be most effective?

• 1+2: black paper 3, aluminum foil 4, polystyrene foam

• 1+2: black paper 3, polystyrene foam 4, aluminum foil

• 1+2: aluminum foil 3, polystyrene foam 4, black paper

• 1+2: aluminum foil 3, black paper 4, polystyrene foam

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Why are denser, more solid materials such as metals better at conducting thermal energy?

• A) All the molecules in metals are in direct contact.

• B) Metallic atoms vibrate more than non-metallic atoms.

• C) The thicker the material, the better it is at conducting heat.

• D) The energy transfers more quickly between the closer molecules.

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