AQA GCSE CHEMISTRY 8462/2H Paper 2 Higher Tier Mark Scheme June 2022

AQA GCSE CHEMISTRY 8462/2H Paper 2 Higher Tier Mark Scheme June 2022. use of oil has decreased by 0.8% or use of oil has decreased from 1.3% to 0.5% use of solar energy has increased by 3.4% or use of solar energy has increased from 0% to 3.4% any one from: • use of oil increased from 2007 to 2009 • no change in oil use between 2013 and 2015 • no change in solar energy use between 2007 and 2009 • use of solar energy increased most between 2013 and 2015 • between 2007 and 2011 more oil was used and between 2013 and 2017 more solar energy was used allow any value below 0.05% for 2007 allow use of oil was highest in 2009 if no other mark is awarded, allow 1 mark for oil decreased and solar energy increased 1 1 1 AO2 4.10.1.1 MARK SCHEME – GCSE CHEMISTRY – 8462/2H – JUNE 2022 8 Question 1 continued Question Answers Mark AO / Spec. Ref 01.2 Level 3: Relevant points (reasons/causes) are identified, given in detail and logically linked to form a clear account. 5‒6 AO2 Level 2: Relevant points (reasons/causes) are identified, and there are attempts at logical linking. The resulting account is not fully clear. 3‒4 AO1 Level 1: Points are identified and stated simply, but their relevance is not clear and there is no attempt at logical linking. 1‒2 AO1 No relevant content 0 Indicative content • carbon dioxide produced • (which is) a greenhouse gas • (therefore) surface temperature increases • (therefore) global warming • (so) climate change • (so) polar ice caps melt • (so) increasing sea levels • (so) flooding • (so) extreme weather events • (so) reduction in biodiversity • (so) famine / drought • sulfur dioxide produced • (which causes) acid rain • (so) damage to buildings / statues • (so) damage to trees • (so) damage to aquatic animals • (so) respiratory problems in humans • carbon / soot produced • (which are) particulates • (which cause) global dimming • (so) respiratory problems in humans • carbon monoxide produced • (which is) toxic 4.9.2.2 4.9.2.3 4.9.3.1 4.9.3.2 MARK SCHEME – GCSE CHEMISTRY – 8462/2H – JUNE 2022 9 Question 1 continued Question Answers Extra information Mark AO / Spec. Ref. 01.3 solar is (a) renewable (source of energy) allow oil is (a) finite (source of energy) 1 AO3 4.10.1.1 Question Answers Extra information Mark AO / Spec. Ref. 01.4 any two from: • sunshine is unreliable • increased demand for energy • lack of space ignore references to cost