G7 Quiz: heat transfer

What are the units for measuring heat energy?

• newtons

• degrees Celsius

• joules

• degrees Fahrenheit

If you leave a cup of hot tea standing in the kitchen for a whole day, what will happen?

• No energy will be transferred.

• It will gain energy from the air in the kitchen.

• Energy will be transferred from the tea to the air until the tea is the same temperature as the air.

• Energy will be transferred from the tea to

  the air in the kitchen, so the tea will end up colder than the air in the kitchen.

   Which statement is correct?

• Temperature is a form of energy.

• Heat describes how hot or cold something is.

• Thermal energy is the same as temperature.

• Temperature describes how hot or cold something is.

   The amount of heat energy in an object depends on three things. Which of these things does it not depend on?

• its mass

• its colour

• its temperature

• the material it is made from

   Which of these materials is a good conductor of heat?

• copper

• air

• water

• glass

When one end of a piece of metal is heated:

• the particles vibrate less and so the particles get closer together.

• the particles vibrate more and the vibrations are passed from particle to particle.

• the heat does not move through the metal.

• the particles get bigger.

Solids are better heat conductors than liquids or gases because:

• the particles are closer together in gases.

• the particles are closer together in liquids.

• the particles are closer together in solids.

• the particles in a solid cannot move.

Why do solids expand when they are heated?

• The particles get bigger.

• The particles vibrate more and take up more space.

• The particles vibrate more and get closer together.

• The particles stick together.

   Which substances can heat travel through by convection?

• solids and liquids

• solids and gases

• only liquids

• liquids and gases

   What happens to a fluid when it is heated?

• The particles get bigger.

• The particles get smaller.

• The particles move around more and take up more space.

• The fluid gets denser.