P4 Science · Chapter 10brightbit.net/worksheets
Heat — Conduction, Convection, Radiation
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- 1.
What is the transfer of heat through a solid called?
(a) Convection(b) Radiation(c) Conduction(d) Evaporation
- 2.
What is convection?
(a) Heat transfer through a vacuum(b) Heat transfer through a solid by particle vibration(c) Heat transfer in fluids (liquids and gases) by the movement of particles(d) Heat transfer by electromagnetic waves
- 3.
The Sun heats the Earth even though there is a vacuum (empty space) between them. This is possible because of ___.
(a) Conduction(b) Convection(c) Radiation(d) Evaporation
- 4.
Which of the following materials is the BEST conductor of heat?
(a) Wood(b) Plastic(c) Copper(d) Glass
- 5.
Why is the handle of a frying pan usually made of wood or plastic?
(a) To make it look attractive(b) Because wood and plastic are poor conductors of heat (insulators)(c) Because wood and plastic are lighter than metal(d) Because metal handles break easily
- 6.
In a room with a heater on the floor, how does warm air circulate around the room?
(a) Warm air sinks and cool air rises(b) Warm air rises and cool air sinks, creating a convection current(c) Heat spreads equally in all directions through the air at the same level(d) Warm air moves horizontally along the floor
- 7.
Dark, matt (non-shiny) surfaces are better at absorbing and emitting heat radiation than light, shiny surfaces. Why are solar water heaters painted black?
(a) To make them more visible on rooftops(b) To absorb the maximum amount of heat radiation from the Sun(c) To prevent rain from damaging the heater(d) To conduct heat to the water inside more quickly
- 8.
A vacuum flask keeps drinks hot for many hours. It has a double-walled glass container with a vacuum between the walls. The inner walls are silvered (mirror-like). Which methods of heat transfer does this design prevent?
(a) Conduction only(b) Convection only(c) Radiation only(d) Conduction, convection, and radiation
- 9.
Name the THREE methods of heat transfer.
- 10.
A metal rod is heated at one end. After a few minutes, the other end becomes hot. Which method of heat transfer is responsible? Explain why this method works in a solid.
Answer key — P4 Science: Heat — Conduction, Convection, Radiation
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- 1.(c) Conduction
- 2.(c) Heat transfer in fluids (liquids and gases) by the movement of particles
- 3.(c) Radiation
- 4.(c) Copper
- 5.(b) Because wood and plastic are poor conductors of heat (insulators)
- 6.(b) Warm air rises and cool air sinks, creating a convection current
- 7.(b) To absorb the maximum amount of heat radiation from the Sun
- 8.(d) Conduction, convection, and radiation
- 9.conduction convection radiation
- 10.conduction — heated particles vibrate faster and pass energy to neighbouring particles along the rod
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