if more than 1 line is drawn from any box in List A, none of those lines gain any credit 3 (b) (i) (the detector) reading had gone down equals detector reading ‘it’ accept the reading in the table is the smallest accept 101 is (much) lower than other readings / a specific value eg 150 not do accept this answer if it indicates the readings are the thickness 1 more beta (particles / radiation) is absorbed / stopped accept radiation for beta particles / radiation accept particles being detected 1 (ii) six years 1 (iii) alpha would not penetrate the cardboard accept the property alpha (particles) cannot pass – through paper / card accept alpha (particles) are less penetrating (than beta) in air is neutral 1 [7] M7.(a) inside the Sun 1 (b) fusion 1 (c) energy 1 [3]
if more than 1 line is drawn from any box in List A, none of those lines gain any credit 3 (b) (i) (the detector) reading had gone down ‘it’ equals detector reading accept the reading in the table is the smallest accept 101 is (much) lower than other readings / a specific value eg 150 do not accept this answer if it indicates the readings are the thickness 1 more beta (particles / radiation) is absorbed / stopped accept radiation for beta particles / radiation accept particles being detected 1 (ii) six years 1 (iii) alpha would not penetrate the cardboard accept the property – alpha (particles) cannot pass through paper / card accept alpha (particles) are less penetrating (than beta) in air is neutral 1 [7] M7.(a) inside the Sun 1 (b) fusion 1 (c) energy 1 [3]
p7_radioactivity_mark_scheme.docx