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Mark Schemes November 2008

GCSE

360Science

Science (2101)Additional Science (2103)Biology (2105)Chemistry (2107)Physics (2109)

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360Science GCSE November 2008-ii-

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November 2008

Publications Code UG020607

All the material in this publication is copyright

© Edexcel Ltd 2008



360Science GCSE November 2008-iii-

Contents

PageMultiple Choice papers

Unit 5005 / 5025 (B1a) Mark Scheme 1

Unit 5006 / 5026 (B1b) Mark Scheme 1

Unit 5007 / 5035 (C1a) Mark Scheme 2

Unit 5008 / 5036 (C1b) Mark Scheme 2

Unit 5009 / 5045 (P1a) Mark Scheme 3

Unit 5010 / 5046 (P1b) Mark Scheme 3

Unit 5015 / 5027 (B2) Mark Scheme 4

Unit 5017 / 5037 (C2) Mark Scheme 4

Unit 5019 / 5047 (P2) Mark Scheme 5

Structured papers

Using the mark scheme for structured papers 6

Unit 5016F / 5028F / 1F (B2) Mark Scheme 7

Unit 5016H / 5028H / 1H (B2) Mark Scheme 15

Unit 5018F / 5038F / 1F (C2) Mark Scheme 23

Unit 5018H / 5038H/ 1H (C2) Mark Scheme 28

Unit 5020F / 5048F / 1F (P2) Mark Scheme 32

Unit 5020H / 5048H / 1H (P2) Mark Scheme 39



0Science GCSE November 2008-1-

Unit 5005 / 5025 (B1a) Mark Scheme

Unit B1a – 5005/5025 Unit B1a – 5005/5025 Unit B1a – 5005/5025

Topics 1 & 2 Topics 1 & 2 Topics 1 & 2

1 C 17 B 25 B

2 D 18 B 26 C

3 C 19 A 27 A

4 B 20 D 28 B

5 A 21 C 29 B

6 B 22 B 30 C

7 D 23 D 31 C

8 C 24 A 32 A

9 B 33 C

10 C 34 B

11 A 35 B12 B 36 C

13 C 37 C

14 B 38 C

15 D 39 B

16 D 40 B

Unit 5006 / 5026 (B1b) Mark Scheme

Unit B1b – 5006/5026 Unit B1b – 5006/5026 Unit B1b – 5006/5026


1 B 17 B 25 B

2 A 18 A 26 C

3 C 19 C 27 A

4 D 20 D 28 A

5 B 21 B 29 C

6 C 22 C 30 D

7 B 23 C 31 D8 B 24 A 32 B

9 B 33 C

10 D 34 C

11 C 35 C

12 A 36 D

13 D 37 A

14 A 38 B

15 D 39 D

16 A 40 C




Unit 5007 / 5035 (C1a) Mark Scheme

Unit C1a – 5007/5035 Unit C1a – 5007/5035 Unit C1a – 5007/5035


1 C 17 A 25 A

2 A 18 C 26 C

3 A 19 D 27 A

4 D 20 B 28 B

5 C 21 C 29 D

6 D 22 D 30 C

7 C 23 C 31 C

8 C 24 B 32 C

9 A 33 C

10 C 34 D

11 B 35 D12 D 36 B

13 D 37 D

14 B 38 A

15 B 39 B

16 D 40 D

Unit 5008 / 5036 (C1b) Mark Scheme

Unit C1b – 5008/5036 Unit C1b – 5008/5036 Unit C1b – 5008/5036


1 B 17 A 25 D

2 D 18 D 26 C

3 A 19 B 27 B

4 B 20 C 28 D

5 C 21 B 29 D

6 D 22 A 30 C

7 C 23 B 31 A

8 B 24 D 32 D9 C 33 D

10 A 34 B

11 D 35 D

12 B 36 B

13 A 37 B

14 D 38 A

15 C 39 C

16 A 40 D




Unit 5009 / 5045 (P1a) Mark Scheme

Unit P1a – 5009/5045 Unit P1a – 5009/5045 Unit P1a – 5009/5045


1 C 17 B 25 A

2 C 18 D 26 D

3 A 19 C 27 D

4 D 20 A 28 C

5 D 21 A 29 A

6 B 22 C 30 B

7 A 23 C 31 A

8 D 24 C 32 C

9 B 33 A

10 B 34 D

11 D 35 B12 B 36 D

13 A 37 D

14 B 38 B

15 A 39 C

16 D 40 B

Unit 5010 / 5046 (P1b) Mark Scheme

Unit P1b - 5010 Unit P1b - 5010 Unit P1b - 5010


1 C 17 B 25 D

2 D 18 A 26 B

3 A 19 B 27 B

4 C 20 A 28 A

5 B 21 C 29 B

6 D 22 C 30 C

7 A 23 D 31 C

8 B 24 D 32 B

9 C 33 A

10 C 34 D11 B 35 D

12 B 36 C

13 C 37 D

14 D 38 A

15 A 39 B

16 A 40 C




Unit 5015 / 5027 (B2) Mark Scheme

Unit B2 – 5015 Unit B2 – 5015 Unit B2 – 5015

Topics 1, 2, 3 & 4 Topics 1, 2, 3 & 4 Topics 1, 2, 3 & 4

1 A 17 C 25 D2 A 18 B 26 A

3 C 19 B 27 C

4 D 20 D 28 D

5 A 21 C 29 D

6 B 22 B 30 B

7 A 23 B 31 A

8 C 24 C 32 D

9 B 33 B

10 A 34 C

11 C 35 C

12 B 36 A13 C 37 C

14 D 38 B

15 A 39 D

16 B 40 B

Unit 5017 / 5037 (C2) Mark Scheme

Unit C2 – 5017/5037 Unit C2 – 5017/5037 Unit C2 – 5017/5037


1 C 17 B 25 B

2 C 18 D 26 B

3 B 19 A 27 C

4 D 20 C 28 A

5 B 21 D 29 B

6 A 22 A 30 D

7 B 23 C 31 B

8 D 24 B 32 B

9 D 33 A

10 A 34 C11 C 35 C

12 D 36 C

13 B 37 D

14 D 38 C

15 C 39 D

16 B 40 B




Unit 5019 / 5047 (P2) Mark Scheme

Unit P2 – 5019/5047 Unit P2 – 5019/5047 Unit P2 – 5019/5047


1 C 17 D 25 B2 B 18 A 26 D

3 B 19 A 27 A

4 D 20 D 28 C

5 A 21 C 29 D

6 D 22 D 30 B

7 A 23 A 31 B

8 C 24 B 32 D

9 B 33 D

10 B 34 A

11 A 35 C

12 A 36 C13 B 37 A

14 A 38 B

15 C 39 B

16 B 40 C




USING THE MARK SCHEME FOR STRUCTURED PAPERS

1. This mark scheme gives you; * an idea of the type of response expected* how individual marks are to be awarded* the total mark for each question* examples of responses that should not receive credit.

2. ; separates points for the award of each mark.

3. / means that the responses are alternatives and either answer should receive fullcredit.

4. ( ) means that a phrase/word is not essential for the award of the mark but helps the examiner to getthe sense of the expected answer.

5. Phrases/words in bold indicate that the meaning of the phrase/word is essential to the answer.

6. OWTTE (or words to that effect) and eq (equivalent) indicate that valid alternative answers (whichhave not been specified) are acceptable.

7. ‘Ignore’ means that this answer is not worth a mark but does not negate an additional correctresponse.

8. ‘Reject’ means that the answer is wrong and negates any additional correct response for that specificmark.

9. ORA (or reverse argument) indicates that the complete reverse is also valid for the award of marks.

10. ecf (error carried forward) means that a wrong answer given in an earlier part of a question is usedcorrectly in answer to a later part of the same question.

MARKING

1. Suggestion/explanation questions should be marked correct even when the suggestion is containedwithin the explanation.

2. Do not award marks for repetition of the stem of the question.

3. Make sure that the answer makes sense. Do not give credit for correct words/phrases which are puttogether in a meaningless manner. Answers must be in the correct scientific context.

AMPLIFICATION

1. In calculations, full credit must be given for a bald, correct answer. If a numerical answer isincorrect, look at the working and award marks according to the mark scheme.

2. Consequential marking should be used in calculations. This is where a candidate's working is correctbut is based upon a previous error. When consequential marks have been awarded write "ecf" next tothe ticks.

3. If candidates use the mole in calculations they must be awarded full marks for a correct answer eventhough the term may not be on the syllabus at their level.

4. If candidates use chemical formulae instead of chemical names, credit can only be given if theformulae are correct.



360Science GCSE November 2008 -7-

Unit 5016F / 5028F / 1F (B2) Mark Scheme

QuestionNumber

Answer Accept Reject

1(a)

(2 x 1)

QuestionNumber


1(b) Two from:1. fins ;

2. streamlined shape;

3. gills;

4. camouflage;

5. any other correct answers e.gswim bladder, mucus;

tail fin, tail




QuestionNumber


1(c) oxygen / shelter / food / nesting site /a place to lay eggs / remove CO2 ;

provides habitat

QuestionNumber Answer Accept Reject

1(d) insufficient space /

small species / not enough food /

fish (tank) too cold ;

grow to the space available

don’t get enough protein




QuestionNumber


2

gene gene

}nucleus;

chromosome;

DNA;

base;




QuestionNumber


3(a) sugar / glucose; accept sources of thesee.g grapes

QuestionNumber


3(b) a gas/carbon dioxideproduced/respiration by yeast;

increase in pressure,fermentation by yeast

oxygen

QuestionNumber


3(c) warm it / add more sugar /add more yeast ; references to

QuestionNumber


3(d) all sugar used up /yeast poisoned by alcohol / diesfermentation / respirationstops / production of carbon dioxide stops;

reaction stops

references to




QuestionNumber

Answer

4

process carbon dioxideremove from theatmosphere

cardon dioxideadded to theatmosphere

fermentation ;

combustion ( )

photosynthesis ;

aerobic respiration ;

decomposition ;

1 mark for each correct tick – max 4 marks

The tick for combustion has already been given on the paper so scores 0 marks

– no mark Accept x in stead of only if in correct boxes and does notoccur in any other boxes




QuestionNumber


5(a) larger lungs / breathe deeper/breathing rate increases/ more red blood cells /haemoglobin has greater affinity for oxygen /heart beats faster;

large lungs breathe/take in more air/oxygenmore haemoglobin/haemoglobin carries moreoxygen/

references

QuestionNumber

Answer Accept Re

5(b) Any one problem or adaptation, to get both marks theadaptation has to be linked. A cold ;

1. more insulation /thicker / fat layer /2. thicker feathers / extra (down) feathers /3. use wings more to produce (more) heat;

OR

B buffeting/strong winds;

1. strong flyers / strong feathers /2. streamlined/3. flying in formation;

OR C longer time without feeding/resting;

1. large food reserves/ higher proportion of fatin food reserves /

2. streamlined /3 flying in formation;

OR

D low pressure / air thinner;1. tolerate water / collecting in tissues/2. bigger/longer/more curved wings;

OR E bright sun / higher levels of UV light;

1. white feathers/2. eyes have feathers to

shade them;

traps more air in feathersthick fat layerlots of feathers/ thick feathers

powerful wings/ large wing span

no food to eatfeed more beforeflying

gliding for longer

refom

fl




QuestionNumber

Answer Accept Re

6(a) Three from :1. to get more oxygen;

2. to muscles/ muscles work faster/harder

3. for more (aerobic) respiration ;

4. for more energy ;

5. to remove more carbon dioxide ;

6. to prevent cramp/build up of lactic acid/reduce oxygen debt

get more air into lungs/oxygen into blood quicker /oxygen demand is high

named muscle

including heartanre

QuestionNumber

Answer Accept Re

6(b) idea of using a breathing rate monitor/repeat several times (take average)

respirometer/ spirometer/use a computer

hem




QuestionNumber

Answer Accept Re

7(a) selective breeding / artificial selection ; na

QuestionNumber

Answer Accept Re

7(b) Two of:1. (milk) fat content/

less or more creamy/etc ;

2. (milk) mineral / calcium content ;

3. (milk) vitamin /vitamin D content ;

4. taste ;

5. volume/amount/quantity/ yield of milk;

6. characteristics of calf such as calm/healthy/faster growth/fertility

ref to nutrients can be creditedfor 1 mark if marking point 1,2,3not given

quantity/leaness of meat



360Science GCSE November 2008 15

Unit 5016H / 5028H / 1H (B2) Mark Scheme

QuestionNumber


1(a) larger lungs / breathe deeper/breathing rate increases/

more red blood cells /haemoglobin has greater affinity for oxygen /heart beats faster;

large lungs / breathe/take inmore air/oxygen / more haemoglobin/

haemoglobin carries more oxygen/

refere




QuestionNumber


1(b) Any one problem or adaptation, to get bothmarks the adaptation has to be linked. A cold ;

1. more insulation /thicker

fat layer /2. thicker feathers /extra (down) feathers /

3. use wings more toproduce (more) heat;

OR B buffeting/strong winds;

3. strong flyers / strong feathers /4. streamlined/3. flying in formation;

OR

C longer time withoutfeeding/resting;2. large food reserves/ higher proportion

of fat in food reserves /2. streamlined /3 flying in formation;

OR D low pressure / air thinner;

3. tolerate watercollecting in tissues/

4. bigger/longer/more curved wings;

OR E bright sun / higher levels of UV light;3. white feathers/4. eyes have feathers to

shade them;

thick fat layertraps more air in featherslots of feathers/thick feathers

powerful wings/large wing span

no food to eatfeed more before flying

gliding for longer

referefor themark

flying




QuestionNumber


2(a) Three from :7. to get more oxygen

8. to muscles /muscles working harder/faster

9. for more (aerobic) respiration ;

10. for more energy ;

11. to remove more carbon dioxide ;

12. to prevent cramp/build up of lacticacid/reduce oxygen debt

get more air into lungs/oxygen into blood quicker /oxygen demand is high

named muscleincluding heart

anaerorespira

QuestionNumber


2(b) idea of using a breathing rate monitor

repeat several times (take average)

respirometer/ spirometer/use a computer

heart/monit




QuestionNumber


3(a) selective breeding / artificial selection ; natura

Question

Number


3(b) Two of:7. (milk) fat content/

less or more creamy/etc ;

8. (milk) mineral / calcium content ;

9. (milk) vitamin /vitamin D content ;

10. taste ;

11. volume/amount/quantity/

yield of milk;

12. characteristics of calf such ascalm/healthy/ fastergrowth/fertility;

ref to nutrients can be credited for 1mark if marking point 1,2,3 not given

quantity/leaness of meat




QuestionNumber


4(a) correct plotting to an accuracy of half square;

deduct 1 mark for incorrect point

C grade line - smooth line showing trend of their plotted points;

dot to dot line

QuestionNumber


4(b) amino acid/protein / any named plant

protein / chlorophyll / DNA / RNA ;

QuestionNumber

Answer

4(c) 1. use nitrate fertiliser quoting a numberbetween 450 and 600;

2. density of 67 kg per hectare;

Credit 400 kg of fertiliser if density iskept at 50 kg per hectare(1 mark)




QuestionNumber


5(a) Three of:1. increasing anyway (at this time of

year) as light intensity / duration/temperature increasing;

2. eutrophication;

3. extra nitrates/ ammonia (enter thewater) ;

4. extra phosphates (enter the water);

5. used for protein/other correct plantsubstance;

sewage has killed the animals which eat the

algae;

Sewage acts as a fertiliser/providesnutrients/minerals as 1 mark for markingpoints 3 and 4

QuestionNumber


5(b) nitrates/ phosphates/ sewage /fertiliser/nutrientsflowed downriver/out to sea/

sewage/nitrates/phosphates/fertiliser became diluted /used up by algae /

more algae eaten by (increased number) of herbivores ;




QuestionNumber


6(a) (magnesium is used to make) chlorophyll; chloroplast

Question

Number


6(b) all active transport sites used/temperature at optimum /ATP/energy being supplied at maximumrate / magnesium no longer a limiting factor;

cells/roots unable to increase rate of uptake of magnesium (ions)any more.other references to something elsebecoming a limiting factor

QuestionNumber


6(c) Three from:1. (magnesium absorbed by) active

transport ;

2. (active transport) uses energy ;

3. (poison) stops energy production ;

4. does not fall to zero because some Mg(ions) absorbed by diffusion ;

5. accept anaerobic respiration stillsupplies some energy ;

idea of ‘(ion) pump’




QuestionNumber


7(a) 1. single strand (as opposed to double)

2. uracil / U (instead of thymine/T)

3. ribose (sugar as opposed todeoxyribose)

4. RNA is shorter (DNA is longer)

5. DNA stays in the nucleus (RNA leavesthe nucleus);

RNA has no T/thymine

QuestionNumber


7(b) Any four from:

1. for translation;

2. for protein synthesis ;

3. (mRNA joins to) ribosomes ;

4. codons/three bases /triplet;

5. match up to anticodons /match up tocomplimentary base pairs/OWTTE ;

6.

tRNA (joins to mRNA) ;

7. which carry (specific) amino acids ;

8. which are joined together ;

9. by enzymes ;

makes proteins /polypeptides




Unit 5018F / 5038F / 1F (C2) Mark Scheme

QuestionNumber


1(a)(i) 26 (0C);

QuestionNumber


1(a)(ii) 6 (0C);

QuestionNumber


1(a)(iii) given out ;

QuestionNumber


1(b) ammonia + nitric acid ammonium nitrate ; If any includ




QuestionNumber


2(a)only the sodium chloride dissolves ;

QuestionNumber


2(b)(i) covalent ;

QuestionNumber


2(b)(ii) ionic ;

QuestionNumber


2(c) too little there/ too dilute to have effect /the scientists believe they are not effective /(tests show) they do not work/they have not been tested;




QuestionNumber


3(a) Note :Placed in correct places

electron to - ;

proton to ⊕;

neutron to ;

QuestionNumber

Answer

3(b) particle relative mass

0electron

1/1836proton1

QuestionNumber


3(c)(i) 3 / three;

QuestionNumber


3(c)(ii) 7 /seven;




QuestionNumber


3(c)(iii) 2,1 / 2.1; 2 1 in correctorder;

Question

Number


4(a)(i) ethene ; monomer/ C2H4;

QuestionNumber


4(a)(ii) (plastic) bag / food wrapper/cling film/ toys;

any item that could be made frompoly(ethene)

plastic, “clotinvariably matypes of plast

QuestionNumber


4(a)(iii) carbon ;

hydrogen ;

C

H

c

h

QuestionNumber

Answer

4(b) to give colourcross-linking substance

makes more flexible ;

plasticisermakes more rigid ;




QuestionNumber


5(a) takes in heat/ energy ; (causes) temperaturedecrease/ gets colder/arguments in termsof bond breaking and making

QuestionNumber


5(b)(i) 2 (HCl) ;Ignore any state symbols

multiples of equation any other numbe(except 1), any cformulae eg HCl2

QuestionNumber


5(b)(ii) carbon dioxide ; CO2/ carbon oxidcarbon monoxide

QuestionNumber

Answer

5(b)(iii) greater (surface) area; more contact between solid/lumpsand liquid/ acid, more (frequent)collisions, more solid particlesavailable

calcium carbonatsmaller pieces

QuestionNumber

Answer

5(b)(iv) (more) concentrated acid/raise temperature/heat ;

stronger/ lower pH (hydrochloric)acid

add catalyst, stirany reactant (eg

QuestionNumber


5(c)(i) electrons are lost ;

2 (electrons) lost;

give electrons (toother atom),

sharing / gainingmarks




QuestionNumber


5(c)(ii) strong (forces of)attraction/bonds /lots of energyto break bonds;

between ions/ionic (bonds);

strong (covalent)bonds = 1 mark

electrostatic attraction

= ionic bond

intermolecular f




Unit 5018H / 5038H/ 1H (C2) Mark Scheme

QuestionNumber


1(a) takes in heat/ energy ; (causes) temperature decrease/gets colder/ arguments in terms of bondbreaking and making

QuestionNumber


1(b)(i) 2 (HCl) ;Ignore any state symbols

multiples of equation any other numbe(except 1), any cformulae eg HCl2

QuestionNumber


1(b)(ii) carbon dioxide ; CO2/ carbon oxid

QuestionNumber

Answer

1(b)(iii) greater (surface) area; more contact between solid/lumps andliquid/acid, more (frequent)collisions,more solid particles available

calcium carbonatpieces

QuestionNumber

Answer

1(b)(iv) (more) concentrated acid/raise temperature/heat ;

stronger/ lower pH (hydrochloric)acid

add catalyst, stiany reactant (eg

QuestionNumber


1(c)(i) electrons are lost ;

2 (electrons) lost;

give electrons (to other atom), sharing / gainingmarks




QuestionNumber


1(c)(ii) strong (forces of)attraction/bonds /lots of energyto break bonds;

between ions/ionic (bonds);

strong (covalent)bonds = 1 mark

electrostatic attraction= ionic bond

intermolecular f

QuestionNumber


2(a)2, 4 / 2.4;

allow 2 4 in any format

QuestionNumber


2(b) number of outer shell electrons =group number ; (unspecified or 4)

(carbon) in group IV where number ofincorrect

QuestionNumber

Answer

2(c) shared electron(s);pair of electrons;

shared electrons to give (atoms with)full outer shells;;

QuestionNumber

Answer

2(d) GRAPHITE: layers slide/slip/rub off OWTTE;

C FIBRES: due to crumpled sheets etcis: stronger/ less flexible/less slippery/ layers can’t slide/OWTTE;




QuestionNumber


3(a) Mg2+ + 2 e Mg ; ;

Mg2+ and e on left, Mg on right;balancing correct species;

e or e-

Mg+2 Mg2+ - 2 e Mg = 1 mark only

mg2+

QuestionNumber


3(b) ions/particles free to move ; atoms/molecules

QuestionNumber


3(c) electrons can move / freeelectrons/delocalised electrons ;

electrons carry the charge ions moving/ refe

QuestionNumber


3(d) layers cannot slide (over each other);

due to particles of different size;

[particles = atoms = ions]

particles cannot easily move past oneanother

molecules




QuestionNumber


4(a) bromine water is yellow / orange;

turns colourless/ decolourises withethene ;

no change with poly(ethene) ;

red/ red-brown/ brown(any combination of these coloursallowed)

Stays orange etc/no reaction

goes clear/ disco

QuestionNumber


4(b) Two from: thermosetting polymers have (cross-)links ;

to form giant structure ;

thermoplastic polymers have nocross-links;

bonds between molecules

suitable diagrams could score bothmarks

QuestionNumber


4(c)(i) e.g. solvents/ cleaning materials/fuel/ antiseptic;

rubbing alcohol/ sterilising dry cleaning/ naipaint stripper/ m




QuestionNumber

Answer

4(c)(ii) either :28.0 g C2H4 46.0 g C2H5OH ;28 x 500 000 tonnes C2H4 500 000 tonnes C2H5OH ;46

= 304348/ 304 000/300 000/ 3 x 10

5

(tonnes) ;

or:

Mr ethanol = 46 ;Moles ethanol = 500 000 / 46 ;Mass ethene = 500 000 x 28 = 304348/ 304000/300000/ 3 x 105 (tonnes) ;

46

[allow 304347, 304347.8, 304347.82…… etc]




Unit 5020F / 5048F / 1F (P2) Mark Scheme

QuestionNumber

Answer Accept Ignore Reject M

1(a)

Note:one mark for each; if additional ticks( i.e. if the candidate ticks 3 or 4 boxes) theynegate one of marks to a max of 2

Can this be explained by staticelectricity?

tick

dust on TV screen

self closing doors

a shock from a car door given

fibre optic lights

a flash of lightning

(

QuestionNumber

Answer Accept Re

1(b) They repel push away at

QuestionNumber

Answer Accept Ignore Re

2(a) it ionises Radioactive

can damage cells /bodycauses cancercauses radiation sicknesscauses radiation poisoningcauses mutations (DNA)

Unqualified

harmful




QuestionNumber


2(b) i keep it as big as possible;

ii as short as possible;

OWTTE/ increase itStand backMove source further away

a short timedo (experiment) as quicklyas possible

Movedetectorfurtheraway

Re

in

QuestionNumber


2(c) any sensible; • do not touch / taste /look at

• use tongs

• lead shielding(suits/aprons etc )

• other suitable shielding• gloves

• wearing film badges

• don’t eat

• wash hands afterexperiment

• have sign on door

• do not point source atanyone

• use weaker source

RadioactivesuitsGogglesUnqualifiedprotective

clothing




QuestionNumber

Answer Accept Re

2(d) alpha;

gamma;

QuestionNumber

Answer Accept Ignore R

3(a) subs;

ans ;

2 8500

17000(J)

• if bald 17000(J) seenaward both marks

• allow ecf if incorrectsubst in terms of numbers of legs

QuestionNumber Answer Accept Ignore R

3(b) 68000(J); 17 000 X 4ecf (from a) 4

QuestionNumber


3(c) • subst;

• ans;

68000(J)/35

1943

allow ecf from b (or a)

1940 or 19001 mark max if done with oneleg

Too many dp




QuestionNumber

Answer Accept Re

4(a) 10 hours; ± 0.5 hour

Question

Number

Answer Accept

4(b) • correct distance /a time;

• ans;

110/2

55

Method shownEg time in minutes 110/120scores 1 max (no ecf)

QuestionNumber

Answer Accept

4(c)(i) the same as;

thrust;

B;

QuestionNumber

Answer Accept R

4(c)(ii) D; thrustforwards force

a




QuestionNumber


4(c)(iii) lift;

by reducing surface area/ flap rate of wings;

Upthrust

tucking her wings inlowering her wings

tilting/ diving downwards

a

QuestionNumber

Answer Accept Ignore

4(d) to reduce the drag forces MUST BE A FORCE REASONIdeas of

• it being easier to holdonto fish

• or ease of flighte.g. Reduction in windresistance

1. streamlinin

2. aerodynam

3. weightdistribution




QuestionNumber

Answer Accept ignore

5(a) Any 3 of

• idea of metastable state/new Uisotope ;

• splits /fission/breaks up/breaks into;

• 2 fission fragments/ daughters;

• additional/new/other neutron(s);

• energy released;

check diagram for answers—

• daughters must be smaller

• accept unlabelled hollow circleas n

unstable

‘creates 2 daughters’ ≡ 2nd and 3rdmarking points

nuclei isotopes

Chain react

pieces /products/c

QuestionNumber


5(b) no of (free) neutrons is reduced ; • idea of control rods ‘capture’neutrons

• blocking n

• absorbs n

• prevention of ‘runaway’ chainreaction

slows dow

attractingneutrons




QuestionNumber


5(c)(i) any sensible ; • no fumes /atmosphericpollutants /OWTTE

• does not contribute to globalwarming /climate change

• small chance of major disaster/accident /leaks

• takes up land

• waste is toxic / radioactive /needs special disposal

• reduction of use of fossil fuels

• scenic pollution

QuestionNumber


5(c)(ii) any sensible; • more jobs• less/more tourists

• houses devalued

• loss of population


• fear of (terrorist attacks)

risk of ca

MARK Ci and Cii TOGETHER…..CREDIT ONE

ENVIRONMENTAL EFFECT AND ONE SOCIALEFFECT WHEREEVER SEEN:SCENIC POLLUTION IS CREDITED ONLY ONCE




Unit 5020H / 5048H / 1H (P2) Mark Scheme

QuestionNumber

Answer Accept ignore

1(a) Any 3 of

• idea of metastable state/new Uisotope ;

• splits /fission/breaks up/breaks into;

• 2 fission fragments/ daughters;

• additional/new/other neutron(s);

• energy released;

check diagram for answers—

• daughters must be smaller

• accept unlabelled hollow circle

as n

unstable

‘creates 2 daughters’ ≡ 2nd and 3rdmarking points

nuclei isotopes

Chain react

pieces /products/c

QuestionNumber


1(b) no of (free) neutrons is reduced ; • idea of control rods ‘capture’neutrons

• blocking n

• absorbs n

• prevention of ‘runaway’ chain

reaction

slows dow

attractingneutrons




QuestionNumber


1(c)(i) any sensible ; • no fumes /atmosphericpollutants /OWTTE

• does not contribute to globalwarming /climate change

• small chance of major disaster

/accident /leaks• takes up land

• waste is toxic / radioactive /needs special disposal

• reduction of use of fossil fuels


QuestionNumber


1(c)(ii) any sensible; • more jobs

• less/more tourists• houses devalued

• loss of population


• fear of (terrorist attacks)

risk of ca

MARK Ci and Cii TOGETHER…..CREDIT ONE ENVIRONMENTAL EFFECT AND ONE SOCIAL

EFFECT WHEREEVER SEEN:SCENIC POLLUTION IS CREDITED ONLY ONCE




QuestionNumber


2(a) all four marking points;;any two marking points;from

• down arrow from CofM same

size as up arrow tolerance10% by eye

• backwards arrow from CofMsame size as forwards arrowtolerance min= no shorter thanlength of 3rd feather up, max = no longer than length of lasttail feather

• label =drag or air resistance(on backwards arrow)

• label =weight or gravity (ondown arrow)

QuestionNumber


2(b)(i) thrust; forwards force

QuestionNumber


2(b)(ii) lift;

by reducing surface area/ flap rate of wings;

Upthrust

• tucking her wings in

• lowering her wings

• tilting/ diving downwards

bald referencto streamlini




QuestionNumber


2(b)(iii) to reduce the drag forces MUST BE A FORCE REASONIdeas of

• it being easier to hold onto fish

• or ease of flight

e.g. Reduction in wind resistance

• str

• ae

• wedis

QuestionNumber


2(c)(i) 15 (N)

QuestionNumber


2(c)(ii) subst.; 15= 2.5 a

rearrangement; a = 15/2.5

ans; 6 (m/s2)

no mark for equation as it is given

• allow subst. and rearrangementmarks in either order

• if bald ans seen award all marks

• TO GET CREDIT MISTAKES MUSTBE MATHEMATICAL NOT PHYSICS,i.e. dimensionally correct




QuestionNumber


2(c)(iii) subst.; 25 40

ans; 1000 (J)OR using m.g.h.

2.5 10 40

• no mark for equation as it isgiven

• if bald correct answer seenaward all marks

• TO GET CREDIT MISTAKES MUSTBE MATHEMATICAL NOT PHYSICSe.g. incorrect mass

QuestionNumber


3(a)(i) tangential line to the circle, labelled V; both line and label needed for themarkmark the line, not the arrow head

QuestionNumber


3(a)(ii) radial inwards arrow, labelled F; both line and label needed for themarkmark the line, not the arrow head

QuestionNumber


3(b) Any TWO from:

• centripetal force/gravity acting;

• velocity is (constantly) changing;

• velocity is a vector OR the direction (of the satellite) changes;

• acceleration is a change in velocity;

moving in a c




QuestionNumber


4(a) One accurately described source and typeother than cosmic radiation

• rocks—N

• fallout- A

• medical waste (from nuclearapplications -A

• radioactive atoms (etc) in

bodies or food -N• smoke detectors- A

• radon gas- N

• medical use (e.g. X rays/tracers) – A

• Burning fossil fuels – N

• Building materials –N

• Named accident site at nuclearreactor -A

• Nuclear Weapons A

HospitalsNuclear powestationsLuminouswatches

cosmic radia

QuestionNumber


4(b) ionising radiation from the cosmos ; allow for cosmos

• from space/the sun/the solarsystem/the universe/ othergalaxies

for ionising allow

• named ionising radiation

• charged particles

• high energy particles

MUST have idea of ionising andwhere from

‘from solar wind’ = 1 mark




QuestionNumber


4c it removes electrons from nearby atoms OWTTE/it causes (nearby) atomsto become ions

causes healthproblems

QuestionNumber


4(d)(i) emission of radon (gas); • (granite/metamorphic/igneous)rocks emit more radiation

• radioactive rocks (as above)

• unstable isotopes (in rocks)

power statio

references tolevel

graphite

Question

Number


4(d)(ii) no mark for yes or noany 2 sensible reasons for either yes orno;;

• radiation level not high /background radiation is not thatdangerous

• has been there for years and noknown ill effects seen

• radon emits alpha which has shortrange therefore wont reach you

• can (now) extract radon or reduceexposure (e.g. improved buildingdesign)

• radon emits alpha which is highlyionising and therefore dangerous

• radon is a gas and therefore youcan breathe it in

• perception that prolongedexposure may cause URT cancers

Naïve/ unstatemen

if it werewe wouldallowed tthere/thehave mov




QuestionNumber


4(e) Two from:

• Cosmic radiation

• How field affects (cosmic) radiation

• Reduction of (cosmic) radiation level

• effect (on cosmic radiation level)varies with latitude / concentrates itat the poles;

ORA ( no effect on most of background)repels/deflects etc

blocks /reduces/ preventspenetration etc

more at poles /less at equator

CREDIT CAN BE SHOWN ON ADIAGRAM

attracts



Further copies of this publication are available fromEdexcel Publications, Adamsway, Mansfield, Notts, NG18 4FN

Telephone 01623 467467Fax 01623 450481

Email [email protected]

Order Code UG020607 November 2008

For more information on Edexcel qualifications, please visit www.edexcel.org.uk/qualifications

nov 08 mark scheme

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