1) What unit is temperature measured in? a) Joules b) Degrees celsius c) Metres d) Degrees e) Centimetres 2) What unit is heat measured in? a) Joules b) Degrees celsius c) Metres d) Degrees e) Centimetres 3) Which one of the situations below contains the most heat? a) A cup of water at 60 degrees celsius b) A cup of water at 70 degrees celsius c) A bath of water at 40 degrees celsius 4) Which statement best describes the specific heat capacity? a) The amount of energy needed to change the state of 1kg b) The temperature to boil water c) The energy needed to raise the temperature of 1kg material by 1 degrees celsius d) The energy needed to melt 1kg of ice 5) How much energy is needed to heat 1kg of water by 25 degrees celsius? (SHC of water = 4200 J/Kg/C) a) 10,500 J b) 4200 J c) 105,000 J d) 42,000 J 6) Which statement best describes specific latent heat? a) The energy needed to change state of 1kg of material b) The energy needed to increase the temperature by 1 degrees celsius of 1kg of ice c) The temperature needed to change the state of 100g of material 7) How much energy is needed to change 1kg of water into steam? (SLH of water = 2,260, 000 J/kg) a) 2,260,000 J b) 226,000 J c) 22,600,000 J 8) Which graph best shows the temperature curve for heating a block of ice until it turns into steam? a) A b) B c) C d) D 9) What is the payback time for loft insulation if it cost £400 to install and save £40 each year? a) 5 years b) 10 months c) 10 years 10) A 100W light bulb converts 25W into light energy. What is the efficiency of the light bulb? a) 25 % b) 75 % c) 0.75

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