Unit 3: Energy & Heat

Energy that comes from the nucleus of an atom. A form of potential energy.

• chemical energy
• Nuclear energy
• Sound energy
• Electrical energy

Conduction occurs best in which state of matter?

• Solids

• Liquids

• Gases

• Plasma

You are roasting marshmallows at a campfire. The metal skewer (stick) that you’re cooking your marshmallow on burns your hand because of _?_.

• conduction

• convection

• radiation

• circulation

Wearing a coat outside on a cold winter day helps keep you warm because...

• It gives you heat energy

• It is fluffy

• It slows down the transfer of heat from your body to the air

• It speeds up the transfer of heat from the sun to your body

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All of these have elastic energy EXCEPT:

• stretched rubber band

• drawn bow and arrow

• water stored behind a dam

• bungee jumper at the bottom of jump

Why would you rather sit on a wooden bench instead of a metal bench on outside on a cold, winter day?

• Because wood is softer
• Because metal is a better conductor of heat than wood
• Because wood is a better conductor of heat than metal
• I give up

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Hot matter is _________ dense and ___________.

• less, sinks
• less, rises
• more, sinks
• more, rises

A swinging pendulum will slow down over time and eventually come to a stop because...

• The energy is destroyed

• Gravity slows it down

• The pendulum encounters friction and its energy is transformed into heat energy

• Because its mass weighs it down

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The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —

• chemical
• electromagnetic
• thermal
• mechanical

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Thermal energy is defined as 

• transfer of energy from an object at a higher temperature to another at a fewer temperature.
• the total amount of kinetic energy of all of the particles in an object.
• movement of the particles in an object.
• the average kinetic energy of the particles in an object

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