AO / Question Answers Extra information Marks Spec ref. 01.1 The shiny surface reflects the infrared Do not accept bounce for 1 AO1 radiation back to the body. reflect. P6.2.4 Silver surfaces are good reflectors of Must indicate direction of 1 infrared radiation. energy transfer. 01.2 Fleece contains trapped air / has a Fleece is an insulator is 1 AO1 low thermal conductivity. insufficient. P1.2.1 01.3 Wrap material around beaker Accept any sensible 1 AO2 method. measure temperature drop in 10 mins 1 WS 2.2 Repeat for other materials 1 Use same starting temperature 1 02.1 for comparison / as a control variable Fair test is insufficient. 1 AO3 WS 2.2 time 1 AO3 02.2 WS 2.2 02.3 wear ear protection (goggles) OR Accept any sensible 1 AO1 suggestions. wear gloves WS 2.4 02.4 Variables are not continuous. Accept they are categoric. 1 AO3 WS 3.1 correct axes labelled 1 AO2 02.5 correct bars 1 WS 3.1 bars in from smallest or largest, or 1 from largest to smallest 03.1 The heater needed to heat up before 1 AO3 transferring energy to the block. WS 3.5 03.2 120 40 Accept 80 °C with no 1 AO2 − working shown for 2 80 °C 1 WS 3.3 marks. 03.3 3.9 104 1 c 80 Accept 487.5 with no 1 AO2  working shown for 3 1 P1.1.3 c = marks. 487.5 1 J/kg °C 1 03.4 Energy will be transferred by heating Accept there is no 1 AO3 to the surroundings insulation. P1.1 WS 2.7 04.1 Sea levels will rise. Any correct sensible 1 AO1 alternatives. Ice caps will melt. 1 P1.3
Question Answers Extra information Marks AO / Spec ref. 01.1 The shiny surface reflects the infrared radiation back to the body. Silver surfaces are good reflectors of infrared radiation. Do not accept bounce for reflect. Must indicate direction of energy transfer. 1 1 AO1 P6.2.4 01.2 Fleece contains trapped air / has a low thermal conductivity. Fleece is an insulator is insufficient. 1 AO1 P1.2.1 01.3 Wrap material around beaker measure temperature drop in 10 mins Repeat for other materials Use same starting temperature Accept any sensible method. 1 1 1 1 AO2 WS 2.2 02.1 for comparison / as a control variable Fair test is insufficient. 1 AO3 WS 2.2 02.2 time 1 AO3 WS 2.2 02.3 wear ear protection (goggles) OR wear gloves Accept any sensible suggestions. 1 AO1 WS 2.4 02.4 Variables are not continuous. Accept they are categoric. 1 AO3 WS 3.1 02.5 correct axes labelled correct bars bars in from smallest or largest, or from largest to smallest 1 1 1 AO2 WS 3.1 03.1 The heater needed to heat up before transferring energy to the block. 1 AO3 WS 3.5 03.2 120 − 40 80 °C Accept 80 °C with no working shown for 2 marks. 1 1 AO2 WS 3.3 03.3 3.9 104  1 c 80 c = 487.5 J/kg °C Accept 487.5 with no working shown for 3 marks. 1 1 1 1 AO2 P1.1.3 03.4 Energy will be transferred by heating to the surroundings Accept there is no insulation. 1 AO3 P1.1 WS 2.7 04.1 Sea levels will rise. Ice caps will melt. Any correct sensible alternatives. 1 1 AO1 P1.3
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