8i: Heating and cooling

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which of these is true?
1. shiny objects radiate more heat
2. black surface reflect heat
3. black objects radiate less heat
4. black objects radiate more heat
heat is conducted best by
1. metals
2. non-metals
3. liquids
4. gases
central heating "radiators" work mainly by
1. conduction and radiation
2. radiation
3. convection
4. conduction
thermal radiation is also called
1. gamma rays
2. infra red
3. microwaves
4. ultra violet
objects with black surfaces
1. are poor radiators of infra red
2. tend not to get as hot in the sunshine as shiny objects
3. tend to get hotter in the sunshine than shiny objects
4. are poor radiatiors of heat
heat arrives on Earth from the Sun by
1. radiation
2. conduction
3. convection
4. ultra violet rays
__________ currents happen because the air has _________, and is less dense
1. convection, expanded
2. conduction, contracted
3. conduction, expanded
4. convection, contracted
which of these cannot be used to measure temperature?
1. spectrometer
2. pyrometer
3. thermometer
4. sphygmomanometer
which of these energy-saving methods takes longest to pay for itself?
1. double glazing
2. draught excluders
3. cavity wall insulation
4. loft insulation
which method of heat transfer works best in solids?
1. insulation
2. conduction
3. convection
4. radiation
which of these energy-saving methods pays for itself quickest?
1. cavity wall insulation
2. draught excluders
3. loft insulation
4. double glazing
objects with shiny surfaces
1. are good radiators of infra red
2. are good radiatiors of heat
3. tend to get hotter in the sunshine than black objects
4. tend not to get as hot in the sunshine as black objects
in a gas oven, the burner is at the bottom because
1. convection currents will circulate the heat
2. we can clearly see the flames and know that the oven is working
3. it is easier to make them that way
4. there needs to be room for the flames
which of these is true?
1. glass is a good conductor of heat
2. painting your house black keeps it cool in the summer
3. trapped air is a good insulator
4. double glazing saves you more energy than cavity wall insulation
the recommended depth of loft insulation is
1. 9 inches
2. 2 inches
3. 6 inches
4. 4 inches
in a hot object, the particles move or vibrate fast. This is called
1. kinetic theory
2. heat theory
3. caloric theory
4. convection theory
the change from gas to liquid is called
1. condensation
2. evaporation
3. freezing
4. melting
double glazing mainly saves energy by stopping __________ through the glass
1. infra red rays
2. conduction
3. radiation
4. convection
whilst melting, the temperature of ice
1. stays constant at 0 degrees Celsius
2. increases greatly
3. stays constant at 100 degrees Celsius
4. increases slowly
which method of heat transfer works best in liquids and gases?
1. conduction
2. convection
3. acceleration
4. transportation
clothing traps air around your body, and thus reduces heat lost by
1. transportation
2. radiation
3. convection
4. conduction
the only way that heat can cross a vacuum is by
1. conduction
2. insulation
3. convection
4. radiation
when we heat a solid, the particles
1. move around faster
2. move slower
3. do not move
4. vibrate faster
which of these is not a method of heat transfer
1. insulation
2. convection
3. radiation
4. conduction
the change from liquid to solid is called
1. melting
2. condensation
3. freezing
4. evaporation
cavity wall insulation also reduces problems with
1. security
2. draughts
3. traffic noise
4. condensation
the law of conservation of energy was devised by
1. James Joule
2. Ernest Rutherford
3. James Watt
4. John Dalton
which of these is the best conductor of heat?
1. glass
2. brass
3. copper
4. steel
latent heat is
1. the energy given out by a cooling liquid
2. the energy needed to melt or boil a substance
3. none of these
4. the energy needed to increase the temperature of a liquid
objects with black surfaces
1. are poor radiatiors of heat
2. are poor radiators of infra red
3. radiate heat slower than shiny objects
4. radiate heat faster than shiny objects