Heat Transfer

What  is the original source of most of the energy that people use?

• By radiation from the Sun.
• By convection from the Sun.
• By radiation from the Earth's core.
• Conduction from Earth's core.

Which best explains how roasting marshmallows happens?

• Heat from the fire is conducted into the marshmallow.
• Heat from the fire is radiated into the marshmallow.
• The coolness of the marshmallow is conducted into the fire.
• The coolness of the marshmallow is radiated into the fire.

Which best describes heat transfer by radiation?

• A slice of bacon frying in a pan.
• A pot on a stove boiling water.
• Cooking a hotdog in a microwave.
• A hot air balloon.

What enables firemen to enter buildings that are on fire and return from them safely?

• Convection cells keep fire away
• The heat makes the building expand so there is no more room
• Firemen wear heat resistant suits
• They are really fast

A spoon is placed into a mug of hot coffee.  As the spoon sits in the coffee it begins to get warm.  The heat from the coffee moves to the cool spoon. The spoon is an example of:

• Conductor
• Insulator
• Radiator
• Contractor

Ms. Smith uses her lunch box to keep her lunch warm. Her lunch box is an example of:

• Conductor
• Insulator
• Radiator
• Contraction

Many electrical wires are wrapped in plastic coating because plastic is

• less expensive than steel
• more dense than copper
• able to keep its shape
• a good insulator

Charles is frying an egg. The process of heating the pan is an example of

• Expansion

• Radiation

• Convection

• Conduction

Charles is boiling water to make macaroni n' cheese.  The process of heating the water is an example of 

• Expansion
• Radiation
• Convection
• Conduction

Billy bumped his head and immediately put an ice pack on his head.  Which heat transfer method is making the ice pack warmer?

• Conduction
• Convection
• Radiation
• Insulation