Thermal energy transfer and conductivity

The baby chickens are kept warm from the heat lamps.  This demonstrates what kind of heat transfer? 

• conduction
• convection
• radiation

Energy that travels as electromagnetic waves is called ______

• conduction
• convection
• radiation

Radiation is how energy from the sun is transferred to Earth.

• true
• false

The transfer of thermal energy through a substance by direct contact is called___.

• conduction
• insulation
• convection
• radiation

As you touch a hot stove the heat transfers -

• from your hand to the stove
• from the stove to your hand
• It doesn't transfer

______ occurs when a cooler, denser mass of a liquid or gas replaces a warmer, less dense mass of a gas or liquid

• Convection
• Conduction
• Radiation

What happens to particles as they heat up?

• They slow down
• Nothing
• They don't move
• They speed up

Thermal energy ALWAYS moves from _____ to _____.

• solid to liquid
• ice to water
• hot to cold
• solid to gas

When choosing materials to build a fireplace, why is brick a better choice than metal?

• Brick is a conductor.

• Brick is heat resistant.

• Metal is a conductor.

• Meat is heat resistant.

What enables fireman 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.

• Fireman wear heat resistant suits.

• They are really fast.