1. (a) (i) temperature of water accept ‘temperature’ 1
do not accept ‘heat’
(ii) 2
57
34
40
74
20
144
award one mark for all three rows of information recorded accurately in the table award one mark for the temperature presented in ascending or descending order
(b) any two from 2
· clock or timer or stopwatch
· thermometer or temperature sensor
· measuring cylinder accept ‘beaker’
· balance accept ‘scales’
‘measuring jug’ is insufficient
(c) to make the test fair accept ‘as a control’ 1
(d) any one from 1
· it did not use her results
· she did not describe the relationship between temperature and dissolving
accept ‘it did not describe what she has found out’
accept ‘she has not given the pattern in her results’
‘she did not explain in detail’ is insufficient answers referring to her evaluation of her investigation or method are insufficient
accept ‘she did not say if changing the temperature affected the time’
accept ‘she did not say what the result showed’
‘she did not say what the results were’ is insufficient
(e) any one from 1
· the hotter the water the quicker it dissolves
accept ‘the hottest dissolved quickest’
accept the converse
· the higher the temperature the less time is taken for the cold cure to dissolve
accept ‘when the water is cold it takes longer to dissolve’
accept ‘when the water is hot it dissolves quickly’
accept ‘temperature does affect the time to dissolve’
the conclusion should refer to the independent and dependent variable
[8]
2. (a) any one from 1· to allow his resting pulse rate to accept ‘to get a reading of heart rate when be determined relaxed’· to compare his pulse before and accept ‘to make sure his heart rate was after drinking the cola steady’· so he would know if it had changed accept ‘to see if there was any change’ accept ‘so he could find out his normal heart rate’ accept ‘to get a reliable reading of his pulse rate’ accept ‘to find the average’
‘he wanted to know his heart rate before he drank his cola’ is insufficient as this is given in the question
(b) his heart rate went up after he drank accept ‘his heart rate or pulse went up’ 1some cola accept ‘it shows his heart rate went up’ accept ‘the graph shows his heart rate changed’ accept ‘the line goes up or changed’ accept ‘the points get higher’
(c) any one from 1· Yasmin’s conclusion describes accept ‘Yasmin is more specific or more how it affected his heart rate while detailed’ Harry’s just says it affected his heart rate· Yasmin’s conclusion describes accept ‘Harry doesn’t say what the effect is’ the direction of the change in his heart rate· Yasmin’s conclusion describes accept ‘Harry’s conclusion could mean that how his heart rate changed his heart rate was slower’
(d) any one from 1· drinking fizzy water would be a control· it would enable them to see whether fizziness or sparkling drinks would have an effect· it would allow them to see if accept ‘you would know if it was bubbles carbon dioxide or carbonation has that had an effect’ an effect
‘to see if something else had an effect’ is insufficient
· it would show it was something accept ‘using more or different drinks would else in cola that had an effect give more evidence’
[4]
3. (a) (i) a mixture 1
if more than one box is ticked, award no mark
(ii) a compound 1
if more than one box is ticked, award no mark
(iii) any one from 1· they are denser than the accept ‘it is heavier than the liquid or the paint’ liquid accept ‘the solid particles are more dense or heavier or too heavy’ accept ‘the solid is denser’
do not accept ‘solid particles are heavy’ without a comparison or qualifier eg ‘too heavy’
· the liquid is less dense than accept ‘the liquid is less dense’ or ‘the liquid is the solid lighter’
(b) any one from 1· it is insoluble in water· water is not a solvent for the paint· it dissolves in white spirit· white spirit is a solvent for the paint
‘it is waterproof’ is insufficient
[4]
4. (a) (i) sedimentary accept ‘conglomerate’ 1
(ii) igneous 1
(b) The temperature falls below freezing point. 1
Expansion forces the cracks in the rock to open. 1
if more than two boxes are ticked, deduct one mark for each incorrect tickminimum mark zero
[4]
5. (a) (i) electrical to chemical if more than one box is ticked, award no mark 1
(ii) chemical to electrical to sound 1
if more than one box is ticked, award no mark
(b) Q 1R 1P 1
[5]
6. (a) (i) · name: nucleus 1
· function: it controls the cell 1
accept ‘nuclei’
accept ‘it contains genetic information’
accept ‘contains chromosomes’
‘it is the brain of the cell’ is insufficient
(ii) tissue 1
if more than one box is ticked, award no mark
(b) (i) any one from 1
· to push food or waste along
accept ‘for peristalsis’
· to break up large pieces of food
accept ‘mechanical digestion’
· to churn food
accept ‘to mix in enzymes’‘to digest food’ is insufficient
(ii) · they speed up digestion 1
accept ‘they digest them’
accept ‘they break them down’
accept ‘they turn it into amino acids’
(iii) · fibre 1
if more than one box is ticked, award no mark
[6]
7. (a) (i) A and C 1
answers may be in either order
both answers are required for the mark
(ii) any one from 1· B· D
(b) any one from 1· not all the light is reflected· some of the light is refracted· some of the light is absorbed· light is scattered by the glass accept ‘it splits into two rays’ or ‘it splits’
[3]
8. (a) (i) C and E 1
answers may be in any orderboth answers are required for the mark
(ii) C 1
(iii) any one from 1to trap or absorb lightphotosynthesis accept ‘to make glucose or sugar or starch or carbohydrate or food’
(b) (i) A 1
(ii) any one from accept ‘lungs’ 1· windpipe· trachea· airways· bronchus· bronchiole· oviduct or fallopian tube
(iii) to remove mucus accept ‘to remove bacteria’ 1 accept ‘to move mucus along’ accept ‘to move or remove bacteria or dust particles’
‘it is a self cleaning mechanism’ is insufficient
do not accept ‘they clean dust or bacteria out of the lungs
’accept ‘to move an ovum or egg along’ if the oviduct or fallopian tube is given as the answer to part ii
(c) B 1
[7]
9. (a) (i) 1
four boxes must be drawn, decreasing in width towards the top, and all labels must be correct for the mark
(ii) any one from 1· each animal eats lots of the accept ‘DDT increases up the food chain’ organism below it in the food chain
accept ‘the heron gets all the DDT in the other animals’accept ‘the heron is at the top of the food chain’
· DDT is not easily excreted accept ‘DDT is not excreted’· DDT is not broken down accept ‘DDT remains in the body’ accept ‘DDT is stored in the body’
(b) (i) through the placenta accept ‘through the umbilical cord’ 1 accept ‘from the mother’s blood’
(ii) in milk accept ‘through the mammary glands’ 1 accept ‘the mother breastfeeds the pup’ accept ‘the mother feeds the pup herself’
‘the mother feeds the pup’ is insufficient
[4]
10. (a) (i) 75 accept ‘50 × 1.5’ 1Nm 1
do not accept lower case n
(ii) 750 accept ‘ ’ or ‘50 × 15’ 1 accept the numerical answer to part (i) ÷ 0.1
(b) any one from 1· a current flows in the coil· the coil or the iron core accept ‘there is a magnetic field’ or ‘the becomes magnetised electromagnet switches on
do not accept ‘the core becomes magnetic’
any one from 1· the counterweight is attracted to the coil or core or the electromagnet· the electromagnet produces a accept ‘the left-hand side of the barrier bigger moment moves down’
‘the right-hand side moves up’ is insufficient
[5]
11. (a) (i) any one from 1· the Earth rotates accept ‘the Sun appears to move across the sky’ accept ‘the Sun is in a different position at different times of day’· the amount of sunlight varies accept ‘different cloud cover’· the angle of the Sun varies
accept ‘in the middle of the day the energy received is greatest’
do not accept ‘in the middle of the day the Sun is hottest or brightest’
(ii) 6.0 accept any number from 5.8 to 6.2 1
(b) (i) a graph starting after 6 am and ending before 6 pm 1a line below the existing line and flat or reaching a 1maximum between 12 noon and 1 pm
(ii) 15 accept ‘ ’ 1
[5]
12. (a) (i) 1000 1
(ii) any three from 3· she was using her muscles accept ‘she was using her muscles’ more· she needed more energy· her rate of respiration accept ‘more respiration’ increased· more oxygen was used up accept ‘more oxygen was needed’· more carbon dioxide was accept ‘there was more carbon dioxide to produced remove’
accept for the first two marking points ‘her muscles need more energy’
(b) (i) it became faster 1
(ii) any one from 1· the breaths are closer accept ‘the waves are closer together’ together· there are more breaths in accept ‘there are more waves in 10 s’ 10 s accept ‘there are three breaths in the first ten seconds and five in the next ten seconds’
[6]
13. (a) (i) A 1
(ii) E 1
(iii) C 1
(b) any one from 1· a compound contains two or more accept ‘a compound contains different elements chemically combined elements or atoms of different types or bonded joined together’
do not accept ‘a compound contains two or more atoms joined together’
· a mixture contains two or more accept ‘a mixture can be separated by elements or compounds or physical means’ substances not chemically combined or bonded
‘a mixture can be separated’ is insufficient
(c) (i) any one from 1· name: oxygen formula: O2· name: hydrogen formula: H2· name: nitrogen formula: N2· name: chlorine formula: Cl2
accept any other element which exists as diatomic molecules in the gaseous state
both the name and formula are required for the mark
do not accept ‘O’ or ‘H’ or ‘N’ or ‘Cl’
(ii) any one from 1· name: carbon dioxide formula: CO2· name: water formula: H2O· name: sulphur dioxide formula: SO2· name: nitrogen dioxide or nitrogen oxide formula: NO2
accept any compound with the formula XY2, eg magnesium chloride MgCl2
both the name and formula are required for the mark
[6]
14. (a) (i) refraction 1
(ii) dispersion 1
(b) One mark is for what would be seen on the screen.
The second mark is for the explanation.
· only the green part would be seen accept ‘only the green’ 1
· other colours are absorbed or removed by the green solution 1
accept ‘only green can go through’
(c) any one from 1
· to break down the cell walls
· to break open the cells
because the green substance is inside the cells or chloroplasts
accept ‘to break up the chloroplasts’
accept ‘to break down the cuticle’
do not accept ‘to break them down’
(d) A comparison between the rate of photosynthesis in Dog’s Mercury and buttercup must be made.
any one from 1
· Dog’s Mercury has a higher rate of photosynthesis than buttercups in low light
accept ‘Dog’s Mercury has a higher rate of photosynthesis in low light’
accept ‘it can photosynthesise better than buttercups in the shade’
accept ‘Dog’s Mercury can make more food in the shade’
do not accept ‘it can photosynthesise in the dark’
· buttercups have a lower rate of photosynthesis than Dog’s Mercury in low light
accept ‘buttercups have a lower rate of photosynthesis in lower light’
· buttercups reach their maximum rate of photosynthesis at higher light intensities
Dog’s Mercury reaches its maximum rate of photosynthesis at lower light intensities
[6]
15. (a) · magnesium displaces copper from the copper sulphate 1
accept ‘magnesium has taken the sulphate’
· copper is replaced by magnesium
accept ‘copper and magnesium change places’
(b) 2
pairs of chemicals
Does a displacement reaction take place? Yes or no
reason
iron + sodium chloride
no
iron is below sodium (in the reactivity series) or sodium is aboveiron (in the reactivity series)
magnesium + lead nitrate
yes
magnesium is above lead (in thereactivity series) or lead is below magnesium (in the reactivity series)
accept ‘iron is less reactive’ or the converse
accept ‘magnesium is more reactive’ or the converse
both the answer and the correct reason are required for each mark
(c) (i) any one from 1
· add zinc to a solution of a salt of each of the other metals
accept ‘add zinc to copper chloride and if it reacts add it to a solution of a salt of the next metal up and so on’
· add each of the other metals to a solution of a zinc salt
accept ‘add the other metals to zinc chloride’
accept any named zinc salt
(ii) any one from 1
· place zinc between the metal in the salt which does react and the metal in the salt which does not react
accept ‘whatever zinc displaced should be below zinc’
· place zinc between the metal which does react and the metal which does not react
accept ‘put zinc below all the metals that react’
parts (c)(i) and(c)(ii) should be marked together
do not accept ‘test the other metals with zinc to see if they react’
[5]
16. (a) (i) B 1
(ii) D 1
(b) (i) any one from 1
· a compound or a new substance has been formed
accept ‘the ratio is always 1P to 2Qs’
accept ‘the atoms or particles have joined’
· R or the product is a new substance
accept ‘the elements have joined’
(ii) substance Q: oxygen 1substance R: carbon dioxide
both answers are required for the mark
(iii) the same numbers of each type of atom are present 1
accept ‘the same number of atoms is present’
accept ‘the same particles or same number of particles are present’
accept ‘there is the same amount of each element’
do not accept ‘the same number of molecules is there’
‘the same amount of elements’ is insufficient
[5]
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