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  1. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Attribution — You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). Noncommercial — You may not use this work for commercial purposes. Share Alike— If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one. Find more at Teaching Science

  2. P2 May 2012 Getting Easy Marks

  3. 1(a)(ii) elastic (potential) energy is stored in a stretched spring 1(c) F = kx (from equation sheet) just use the equation; note that the extension is given in mm and needs to be converted. 3 marks

  4. 2(a)(ii) Radon gas makes up half of the dose, which you can calculate by totalling the other sources. Cross them out as you go to avoid a miscount. 3(a) W = mg (from equation sheet) just use the equation; remember that weight is a force so is measured in Newtons(N). 4 marks

  5. 4(a) GPE = mgh (from equation sheet) just use the equation, no rearranging needed. 4(c)Every time speed is less than expected, think about the effects of friction and air resistance. 4 marks

  6. 5(a) current is a flow or movement of charged particles. potential difference is a gain or loss of the energy of the charged particles, which often causes movement. 2 marks

  7. 5(c) Use the graph to find the value for the current when p.d. is 6V before using P = IV (from equation sheet) 6(a) In a protostarfusion has not started. Explaining this probably means discussing pressure and energy production. 4 marks

  8. 7(a)(i) V = IR (from equation sheet) Rearrange this to R = V/I before substituting in converted values;remember that resistance is measured in ohms (Ω). 7(b) A high current causes a fuse to melt but causes movement in a circuit breaker. 5 marks

  9. These are not all the marks available, but nobody doing Higher tier should have missed many of these 22. • Some marks were gained by recall, some by knowing what to doin the exam. • Now total the marks that you missed – how would they have boosted your grade?

  10. A* 41 A 33 B 25 C 18 D 11

  11. These grade boundaries change from year to year; for this paper, the A* was high but the D was low.

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