Heat transfer

Worksheet: Heat transfer

Name:Class:

Answer the questions.

1. How does heat travel through a solid metal spoon placed in hot soup?
   a) Conductionb) Convectionc) Evaporationd) Radiation
2. Which material is the best conductor of heat?
   a) Copperb) Plasticc) Rubberd) Wood
3. In conduction, particles pass on vibrations to their neighbours.
   a) Trueb) False
4. Why does heat conduct better in metals than in gases?
   a) Particles are biggerb) Particles are closer togetherc) Particles are colderd) Particles do not move
5. Heat transfer by the movement of fluids is called what?
   a) Conductionb) Convectionc) Insulationd) Radiation
6. When air is heated, what happens to its density?
   a) It becomes zerob) It decreasesc) It increasesd) It stays the same
7. Warm air rises above a radiator. What is this movement of air called?
8. How does heat from the Sun reach Earth?
   a) Conductionb) Convectionc) Evaporationd) Radiation
9. Radiation needs particles of matter to carry heat from place to place.
   a) Trueb) False
10. Which surface is best at absorbing heat radiation?
    a) Dull blackb) Dull whitec) Shiny silverd) Shiny white
11. Why do woolly jumpers keep you warm?
    a) They block cold particlesb) They conduct heat wellc) They create heatd) They trap air, which insulates
12. Name the type of material that is poor at conducting heat.
13. Why is a double-glazed window with a gap between the panes a good insulator?
    a) Air conducts heat very wellb) Gaps let in more heatc) Glass makes heatd) Trapped air or gas conducts poorly
14. What is temperature a measure of?
    a) How fast heat is lostb) How hot or cold something isc) The mass of a substanced) The total heat energy stored
15. A bathtub of warm water contains more heat energy than a cup of boiling water.
    a) Trueb) False
16. What unit is usually used to measure heat energy in science?