M11. (a) (i) 25 (%) do not accept ¼ 1 (ii) increases 1 (b) tick () in top and bottom box both required 1 (c) SHINY surfaces are good reflectors of infra-red radiation accept white for shiny or black surfaces are POOR reflectors of infra-red radiation accept bad for poor accept insertion of before in statement ‘not’ ‘good’ or black surfaces are good EMITTERS of infra-red radiation or black surfaces are good ABSORBERS of infra red radiation 1 [4] - (i) D, C B, in either order, then A M12. or tick or cross on the A 1 (ii) matt absorbs energy (better than shiny) the converse arguments are acceptable 1
M11. (a) (i) 25 (%) do not accept ¼ 1 (ii) increases 1 (b) tick () in top and bottom box both required 1 (c) SHINY surfaces are good reflectors of infra-red radiation accept white for shiny or black surfaces are POOR reflectors of infra-red radiation accept bad for poor accept insertion of ‘not’ before ‘good’ in statement or black surfaces are good EMITTERS of infra-red radiation or black surfaces are good ABSORBERS of infra red radiation 1 [4] - M12. (i) D, C or B, in either order, then A tick or cross on the A 1 (ii) matt absorbs energy (better than shiny) the converse arguments are acceptable 1
p2_energy_transfer_by_heating_mark_scheme.docx