Heat Transfer Unit Test

Claire is cooking eggs in a frying pan on a stove. What method of heat transfer is she using?

• conduction
• convection
• radiation
• NONE of the above

What method of heat transfer does a hot air balloon use to travel?

• conduction
• convection
• radiation
• None of the aboveW

Which best describes heat transfer by conduction?

• A slice of bacon frying in a pan.
• Noodles cooking in boiling water.
• Hot dot in a microwave.
• Bread in a toaster.

Hot air rising and cool air sinking is an example of what type of current?

• Gulf Stream
• Convection Current
• Jet Stream

Solar panels are large plates that people put on their roofs to capture the sun's energy. What heat transfer method is used to capture the heat & energy?

• conduction
• convection
• radiation
• None of the above

What allows firemen to enter buildings that are on fire and return safely?

• Convection cells keep fire away.
• The heat makes the building expand so there is room to walk around.
• Fireman wear heat resistant suits.
• Fireman are really fast.

Steel, iron, and copper are all examples of what?

• conductors
• convection
• radiation
• insulators

Why should space be left at the top of a water bottle before freezing it?

• Water expands when frozen.
• Water contracts when frozen.
• Plastic expands when frozen.
• Plastic contracts when frozen.

Why does a balloon on top of an empty water bottle expand when the bottle is placed in hot water?

• Heat causes gases to expand.
• Heat causes gas to contract.
• As air cools, currents flow clockwise.
• As air cools, currents flow counterclockwise.

Which is an example of a good insulator?

• wool
• steel