Energy 0.0 / 5 ? PhysicsEnergyGCSEAQA Created by: imafishCreated on: 13-05-19 18:21 What is a kinetic energy store? Energy an object has because it is moving 1 of 25 What is a gravitational energy store? Energy an object has because it has been raised up high 2 of 25 What is a thermal energy store? Energy an object has because of the movement of its particles 3 of 25 What is a chemical energy store? Energy stored in a fuel, food or battery because of the chemical bonds 4 of 25 What is an elastic energy store? Energy stored in an object because it has been stretched or squashed 5 of 25 What is a nuclear energy store? Energy stored in the atomic nucleus 6 of 25 State 3 ways energy can be transferred between objects Light (electromagnetic radiation) sound, electric current 7 of 25 Define "specific heat capacity" The energy needed to heat 1kg by 1 degree centigrade 8 of 25 What is "dissipation"? When energy spreads out and can't be used 9 of 25 What is a "closed system"? A group of objects which energy is prevented from leaving or entering 10 of 25 What happens to the amount of energy in a closed system? It remains constant 11 of 25 Give the formula for efficiency Efficiency = Useful energy out/ total energy in 12 of 25 What is an "energy resource"? An energy store that can be transferred usefully 13 of 25 What is a renewable energy source? An energy resource that can be replenished and won't run out 14 of 25 What is a non-renewable energy source? An energy resource that can't be replenished 15 of 25 State 7 renewable energy resources Wind, tidal, hydroelectric, wave, solar, geothermal, biomass 16 of 25 State 3 non-renewable energy resources Coal, crude oil, natural gas 17 of 25 What is a fossil fuel? A fuel made over millions of years from dead plants and animals 18 of 25 State 3 fossil fuels Coal, crude oil, natural gas 19 of 25 What is "power"? Rate of energy transfer 20 of 25 What is the formula for gravitational potential energy? GPE = mgh 21 of 25 What are is the unit for energy? joules (j) 22 of 25 What is the formula for kinetic energy? KE = ½mv² 23 of 25 What is the formula relating energy, power and time? P = E/t 24 of 25 What is the unit of power? watts (W) 25 of 25
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