1(a) any three from
respiration
reproduction
growth
nutrition
excretion
movement / can move
sensitivity /irritability
1(b)(i) (many) more yeast (cells) / more cells/ cells multiplied / yeast increases / multiply themselves
1(b)(ii) cells had divided /reproduced
2(a) Forces between the particles are weak.
(b) dissolving
2(c) any two from (idea that) particles will have more energy particles move faster particles collide more particles spread out more
3 mirror normal angle of incidence angle of relection incident ray reflected ray
4(a) A
4(b) pollen lands on stigma/pollen transferred from one flower to another / pollen goes from anther to stigma /pollen lands on A / ‘male gamete’ for ‘pollen’
4(c) C
4(d) (nucleus of) pollen and (nucleus of) ovule fuse
5(a) (electronic) balance /scale(s) / beam balance / triple beam balance Do not accept weighing balance or weighing scales 5
(b) D
5(c) Hazard: hot dish / burn hand / the oven is hot. To avoid the hazard Rajiv should use tongs / heat resistant gloves / let the dish cool before picking it up. OR Hazard: getting soil in eyes. To avoid the hazard Rajiv should wear goggles / safety glasses.
6 yellow magenta cyan white
7 When metals react with acid the products are a salt and hydrogen. When carbonates react with acid the products are a salt, water and carbon dioxide.
8(a) to obtain reliable results/ to work out an average
8(b) any one from birds are (too) mobile / immigration / migration / fly away (rapid) birth / death out at different times of day impossible to count them all / too many / over too large an area idea of difficult to be sure that you have not counted same bird twice or some not at all
8 (c) any two from habitat (destruction) food (supply) / damage to food chains / amount of prey predation / hunters competition pest control (trapping / shooting / use of poisons) climate (change) disease time of year / season pollution
9(a) The nucleus of the atom contains protons and neutrons. The nucleus is surrounded by particles called electrons.
9(b)(i) H
9(b)(ii) Na
10(a) the transfer of energy/ energy transfer / energy flow
10(b) mouse, rabbit and grasshopper
10(c) the hawk feeds at more than one trophic level / can be a tertiary consumer/ it eats (both primary and) secondary consumers
10(d) hawk
10(e) any one from go up – more grass to eat /less competition (by rabbits) for food go down – lack of rabbits means hawks will need to eat more mice stay the same – idea that more grass to eat AND more predation by hawks will even out.
11(a) any two from sun / solar wind / (a)eolic wave geothermal biofuel / biomass tidal Do not accept nuclear .Accept wood 11(b) any three from (%) of coal decrease (%) of oil decrease (%) of natural gas decrease (%) of (other) renewables increase / example of renewable increasing e.g. tidal increases (%) of hydroelectric increase
12(a) The name of this electrical component is a cell. The electrical circuit symbol for this component is...... or Name of this electrical component is a battery. The electrical circuit symbol for this component is .....
12(b) In circuit A the lamps do not work. This is because there is no current/a gap in the circuit/ it is a series circuit / electrons cannot flow / the circuit does not transfer electrical energy. In circuit B the lamps work. This is because there is current to each lamp/ current divides /the lamps are still in a complete circuit/it is a parallel circuit / electrons can flow / the circuit still transfers electrical energy.
13(a) hydrogen
13(b) calcium hydroxide
13(c) (idea that) too reactive /not safe /may burst into flames
14 pencil has large(r) area so less pressure / so low pressure
1(b)(i) (many) more yeast (cells) / more cells/ cells multiplied / yeast increases / multiply themselves
1(b)(ii) cells had divided /reproduced
2(a) Forces between the particles are weak.
(b) dissolving
2(c) any two from (idea that) particles will have more energy particles move faster particles collide more particles spread out more
3 mirror normal angle of incidence angle of relection incident ray reflected ray
4(a) A
4(b) pollen lands on stigma/pollen transferred from one flower to another / pollen goes from anther to stigma /pollen lands on A / ‘male gamete’ for ‘pollen’
4(c) C
4(d) (nucleus of) pollen and (nucleus of) ovule fuse
5(a) (electronic) balance /scale(s) / beam balance / triple beam balance Do not accept weighing balance or weighing scales 5
(b) D
5(c) Hazard: hot dish / burn hand / the oven is hot. To avoid the hazard Rajiv should use tongs / heat resistant gloves / let the dish cool before picking it up. OR Hazard: getting soil in eyes. To avoid the hazard Rajiv should wear goggles / safety glasses.
6 yellow magenta cyan white
7 When metals react with acid the products are a salt and hydrogen. When carbonates react with acid the products are a salt, water and carbon dioxide.
8(a) to obtain reliable results/ to work out an average
8(b) any one from birds are (too) mobile / immigration / migration / fly away (rapid) birth / death out at different times of day impossible to count them all / too many / over too large an area idea of difficult to be sure that you have not counted same bird twice or some not at all
8 (c) any two from habitat (destruction) food (supply) / damage to food chains / amount of prey predation / hunters competition pest control (trapping / shooting / use of poisons) climate (change) disease time of year / season pollution
9(a) The nucleus of the atom contains protons and neutrons. The nucleus is surrounded by particles called electrons.
9(b)(i) H
9(b)(ii) Na
10(a) the transfer of energy/ energy transfer / energy flow
10(b) mouse, rabbit and grasshopper
10(c) the hawk feeds at more than one trophic level / can be a tertiary consumer/ it eats (both primary and) secondary consumers
10(d) hawk
10(e) any one from go up – more grass to eat /less competition (by rabbits) for food go down – lack of rabbits means hawks will need to eat more mice stay the same – idea that more grass to eat AND more predation by hawks will even out.
11(a) any two from sun / solar wind / (a)eolic wave geothermal biofuel / biomass tidal Do not accept nuclear .Accept wood 11(b) any three from (%) of coal decrease (%) of oil decrease (%) of natural gas decrease (%) of (other) renewables increase / example of renewable increasing e.g. tidal increases (%) of hydroelectric increase
12(a) The name of this electrical component is a cell. The electrical circuit symbol for this component is...... or Name of this electrical component is a battery. The electrical circuit symbol for this component is .....
12(b) In circuit A the lamps do not work. This is because there is no current/a gap in the circuit/ it is a series circuit / electrons cannot flow / the circuit does not transfer electrical energy. In circuit B the lamps work. This is because there is current to each lamp/ current divides /the lamps are still in a complete circuit/it is a parallel circuit / electrons can flow / the circuit still transfers electrical energy.
13(a) hydrogen
13(b) calcium hydroxide
13(c) (idea that) too reactive /not safe /may burst into flames
14 pencil has large(r) area so less pressure / so low pressure
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