HEAT TRANSFER

Which statement about heat energy is true?

• Heat energy does not flow

• Heat energy flows from a region of high temperature to a region of low temperature

• Heat energy flows from a region of low temperature to a region of high temperature

• none of them

What is an insulator?

• 
  A material that allows heat energy to follow through it easily

• 
  A material that will not allow heat energy to flow through it easily

• A metal

• none of them

Which statement about convection is false?

• 
  Convection occurs in solids

• Convection occurs in liquids

• Convection occurs in gases

• Conduction occurs in solid

What happens to the molecules in a liquid as it gets hotter?

• They speed up

• They slow down

• They stay at the same speed

• They speed up and down

What happens to the molecules in a solid as it gets hotter?

• Start vibrating

• Vibrate faster

• Vibrate slower

• They stay at the same speed

Which statement is true about a dull, matt surface?

• A dark, matt surface is worse at absorbing heat energy than a light shiny surface

• A dark, matt surface is better at absorbing heat energy than a light shiny surface

• 
  A dark matt surface is worse at radiating heat energy than a light shiny surface

• none of them

Which material is a poor conductor of heat?

• Aluminum

• Copper

• Wool

• Iron

Heat transfer that does not require a medium is called?

• Conduction

• Convection

• Radiation

• Reflection

What happens to the water at the bottom of a flask when heated from below?

• It cools down

• It evaporates

• It rises

• It condenses

What phenomenon explains why hot water rises?

• Conduction

• Convection

• Radiation

• Expansion