REVISION PACK QUESTIONS AND SOLUTIONS
◉ Heating (transfer of energy). Answer: Energy transferred when
there is a change in temperature
◉ Radiation (transfer of energy). Answer: Energy transferred by
light or other electromagnetic waves)
◉ Specific heat capacity. Answer: The energy required to raise the
temperature of one kg of a substance by one degree Celsius
◉ Power. Answer: Rate at which energy is transferred
or
Rate at which work is done
◉ Units of power. Answer: Watts (W)
◉ Unit of energy. Answer: Joules (J)
◉ Closed system. Answer: A system in which no matter is allowed to
enter or leave
, ◉ What are the 3 fossil fuels?. Answer: Coal, oil, natural gas
◉ Renewable energy. Answer: A resource that is being replenished
as it is used
◉ Unrenewable energy. Answer: A resource that cannot be
replenished in a single lifetime
◉ Bio-fuel. Answer: Fuel made from plants and plant or animal
waste
◉ Wind energy. Answer: The energy captured by transforming the
motion of air into electrical energy using a turbine
◉ Nuclear fuel. Answer: Fuel derived from radioactive materials that
give off energy
◉ Hydroelectric energy. Answer: Energy obtained from flowing
water. Usually involved building a dam
◉ Geothermal energy. Answer: Energy from steam or hot water
produced from hot or molten underground rocks.