Heat Transfer Review

What is the definition of CONDUCTION?

• When heat is transferred from objects like rays of light or electromagnetically.
• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
• When heat transfers from objects that are touching.
• When heat transfers through the heater or AC in your house.

What is the definition of CONVECTION

• When heat transfers through waves.
• When heat transfers from objects that are touching.
• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
• Heat traveling from the sun

Molecules in cold things move more _________
than in hot things.

• quickly
• slowly
• happily
• merrily

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

• Hotter to colder
• Colder to hotter
• Hotter to hotter
• Colder to colder

If you put a metal spoon and a wooden spoon into a pot of boiling water, one will become too hot to touch.  Why?

• Metals conduct heat better than wood.
• Wood conducts heat better than metals.
• Metals pull in heat because heat is attracted to metals.
• Wood isn't as strong as metals.

Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low
• low to high
• high to high
• It can travel high to low and low to high. 

How is heat transferred in radiation?

• through solids

• through liquids

• through time

• through air

Which shows an example of convection?

• Jose cooks an egg in a pot of boiling water.

• Clara burns her hand by touching a light bulb.

• Lucy wraps herself in an electric blanket to keep warm.

• Ben holds the end of a metal rod in a fire to cook hot dogs.

Which is an example of radiated heat for cooking?

• cooking a pot of soup

• scrambling eggs on the stove

• grilling hot dogs over a campfire

• frying hamburgers in a frying pan

Which is an example of heat being transferred by conduction?

• a furnace heating the air in a school

• an ice cube melting in a person's hand

• a pot of water on a stove boiling

• the sun heating water in a swimming pool