AO / Question Answers information Marks Spec ref. 01.1 2 marks for all correct. 2 AO1 1 mark for at least one P4.1.1 correct. 01.2 12 1 AO2 P4.1.1 01.3 6 1 AO2 P4.1.1 01.4 Protons 1 AO1 Neutrons 1 P4.1.1 02.1 0.026 1 AO1 WS 3.3 02.2 nuclear industry Accept any sensible 1 AO1 nonnatural source. medical, for example, X-rays 1 P4.3.1 03.1 A: gamma and beta 1 AO1 B: gamma 1 P4.2.1 C: alpha, beta, and gamma 1 03.2 Any one from Accept any sensible 1 AO3 answers. use to handle samples WS 1.5 keep sample in box 03.3 radiation can be detected outside 1 AO2 the body. 1 P4.3.3 The half-life is long enough for the test 1 to be carried out. The half-life is short enough so that a radioactive isotope is not in body for a long time. 04.1 5730 × 2 Accept 11 460 (years) with 1 AO2 no working shown for 2 11 460 (years) 1 P4.2.3 marks. AO / Question Answers Extra information Spec ref. 04.2 Any six from: Accept any other credible 6 AO3 answers. It’s one of the ways communities WS 1.6 of scientists find out what is going on in their field.
Question Answers information Marks AO / Spec ref. 01.1 2 marks for all correct. 1 mark for at least one correct. 2 AO1 P4.1.1 01.2 12 1 AO2 P4.1.1 01.3 6 1 AO2 P4.1.1 01.4 Protons Neutrons 1 1 AO1 P4.1.1 02.1 0.026 1 AO1 WS 3.3 02.2 nuclear industry medical, for example, X-rays Accept any sensible nonnatural source. 1 1 AO1 P4.3.1 03.1 A: gamma and beta B: gamma C: alpha, beta, and gamma 1 1 1 AO1 P4.2.1 03.2 Any one from use to handle samples keep sample in box Accept any sensible answers. 1 AO3 WS 1.5 03.3 radiation can be detected outside the body. The half-life is long enough for the test to be carried out. The half-life is short enough so that a radioactive isotope is not in body for a long time. 1 1 1 AO2 P4.3.3 04.1 5730 × 2 11 460 (years) Accept 11 460 (years) with no working shown for 2 marks. 1 1 AO2 P4.2.3 Question Answers Extra information AO / Spec ref. 04.2 Any six from: It’s one of the ways communities of scientists find out what is going on in their field. Accept any other credible answers. 6 AO3 WS 1.6
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