• the wind speed varies accept ‘it depends on the weather’ • sometimes the wind does not blow accept ‘the wind is unreliable’ • the wind cannot be controlled accept ‘it varies’ accept ‘it could be too windy’ responses that do not refer to wind, such as ‘they spoil the landscape’ or ‘they kill birds’ or ‘they are too noisy’ or ‘interfere with TV and radio signals’ are insufficient 1 (L5) (d) (i) • Sun(light) accept ‘light’ accept ‘solar (energy)’ do not accept ‘heat’ ‘photosynthesis’ is insufficient 1 (L5) (ii) • renewable source both the correct answer and a correct explanation are required for the mark you can grow more plants accept ‘you grow it (again)’ do not accept ‘you can use it again’ ‘it is a biofuel’ is insufficient 1 (L6) [7] M2. (a) • accept a battery drawn as ‘’ all three symbols must be connected in series all three symbols must be drawn correctly do not accept a switch drawn as do not accept a battery drawn as do not accept a motor drawn as 1 (L4) (b) (i) • the battery or cell(s) accept ‘batteries’
1 (L4) (ii) • heat 1 (L4) • sound accept ‘thermal’ answers may be in either order 1 (L4) (c) (i) • it turned more slowly accept ‘not as much energy’ accept ‘it was less powerful’ accept ‘it does not work as well’ accept ‘it would stop’ or ‘it would not go round’ ‘it heats up’ is insufficient 1 (L4) (ii) • it was brighter accept ‘blew it’ or ‘it went out’ accept ‘it became hotter’ or ‘it heated up’ 1 (L4) [6] ## (a) • correct bulb symbol accept other symbols for a bulb e.g. 1 (L4) • correct switch symbol do not accept a closed switch 1 (L4) • components connected in series accept circuits with the components in a different order accept incorrect but recognisable symbols or drawings for the third marking point only do not accept responses where the number of components is incorrect 1 (L4) (b) • cell(s) accept ‘battery’ 1 (L3)
(c) all five poles are required for the mark 1 (L4) (d) steel accept ‘iron’ accept ‘nickel’ accept ‘cobalt’ 1 (L3) [4] M9. (a) • the core becomes magnetised accept ‘the disc becomes magnetised’ accept ‘there is a magnetic field’ accept ‘it becomes an (electro)magnet’ accept ‘the stronger the current the stronger the magnet’ do not accept ‘the iron core becomes magnetic’ do not accept ‘the magnet gets stronger’ 1 (L7) any one from • the core attracts the iron disc accept ‘the disc is pulled down’ ‘the disc moves down’ is insufficient as it does not imply that a force is exerted • there is more force on the iron disc accept ‘the magnet exerts a force on the disc’ ‘there is a force on the disc’ is insufficient as it does not refer to the origin of the force 1 (L7) (b) any one from • it would melt accept ‘it would fuse’ ‘the coil would break’ is insufficient • it would get too hot accept ‘it could catch fire’ accept ‘it would blow’ ‘it would get hot’ is insufficient 1 (L7)
(c) • the greater the current, the greater the force or field accept the converse answers must refer to a pattern describing a continuous variable do not accept ‘it becomes more magnetic’ • the more turns, the greater the force or field accept the converse accept ‘the more turns, the more powerful or stronger the magnet’ answers must include a comparison ‘the more turns, the more powerful it is’ is insufficient accept ‘the electromagnet with 200 turns is stronger’ accept ‘doubling the turns more than doubles the force’ award one mark if the answer refers to a number of coils rather than number of turns 2 (L7) [5] M10. (a) (i) the number of turns or coils of wire accept ‘the coils’ accept ‘the turns’ 1 (L5) (ii) any one from • the current • the length or thickness or material of the wire or coil accept ‘the voltage or power’ accept ‘the wire’ • the circumference of the coil • the size of paper-clips accept ‘the paper-clips’; ‘position of the coil on the nail’; ‘tightness of the coil’; accept ‘distance between turns’; ‘the nail’ do not accept ‘the number of paper-clips’ 1 (L5) (iii) any one from • count the paper-clips picked up accept ‘number of paper-clips’; ‘count them’
M11. (a) they will repel or it will push the magnet away or it will push the coil accept ‘it will change the direction of the force’ accept ‘it will make the magnet twist around and attract’ do not accept ‘the magnet moves away’ 1 (L7) (b) (i) any one from • because the magnet is heavier or the paper clip is lighter accept ‘because the magnet is heavy’ • so the moments are equal 1 (L7) (ii) current in the coil produces a magnetic field accept ‘the coil becomes an electromagnet’ or ’the coil is magnetised’ 1 (L7) • the magnet is attracted or repelled accept ‘the field or coil exerts a force on the magnet’ 1 (L7) (iii) any one from • the straw is deflected more or moves more • the reading is higher or goes up 1 (L7) any one from • it increases the magnetic field • it makes the electromagnet stronger • it attracts or repels the magnet more strongly 1 (L7) [6] E2. Facility values