edexcel gcse physics/additional science...

34
Edexcel GCSE Centre Number Candidate Number Write your name here Surname Other names Total Marks Paper Reference Turn over You must have: Calculator, ruler Instructions Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name, centre number and candidate number. Answer all questions. Answer the questions in the spaces provided there may be more space than you need. Information The total mark for this paper is 60. The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question. Questions labelled with an asterisk ( *) are ones where the quality of your written communication will be assessed – you should take particular care with your spelling, punctuation and grammar, as well as the clarity of expression, on these questions. Advice Read each question carefully before you start to answer it. Keep an eye on the time. Try to answer every question. Check your answers if you have time at the end. *S39596A0120* S39596A ©2011 Edexcel Limited. 6/8/8/2/ 5PH2F/01 Additional Sample Assessment Material Time: 1 hour Physics/Additional Science Unit P2: Physics for Your Future Foundation Tier

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Edexcel GCSECentre Number Candidate Number

Write your name hereSurname Other names

Total Marks

Paper Reference

Turn over

You must have:Calculator, ruler

Instructions• Use black ink or ball-point pen.• Fill in the boxes at the top of this page with your name, centre number and candidate number.• Answer all questions.• Answer the questions in the spaces provided – there may be more space than you need.

Information• The total mark for this paper is 60. • The marks for each question are shown in brackets – use this as a guide as to how much time to spend on each question.• Questions labelled with an asterisk (*) are ones where the quality of your written communication will be assessed – you should take particular care with your spelling, punctuation and grammar, as

well as the clarity of expression, on these questions.

Advice• Read each question carefully before you start to answer it.• Keep an eye on the time.• Try to answer every question.• Check your answers if you have time at the end.

*S39596A0120*S39596A©2011 Edexcel Limited.

6/8/8/2/

5PH2F/01Additional Sample Assessment MaterialTime: 1 hour

Physics/Additional ScienceUnit P2: Physics for Your Future

Foundation Tier

2

*S39596A0220*

FORMULAE

You may find the following formulae useful

charge = current × time Q = I × t

potential difference = current × resistance V = I × R

electrical power = current × potential difference P = I × V

energy transferred = current × potential difference × time E = I × V × t

speed = distance

time

acceleration = change in velocity

time taken a

v ut

=−( )

force = mass × acceleration F = m × a

weight = mass × gravitational field strength W = m × g

momentum = mass × velocity P = m × v

work done = force × distance moved in the direction of the force E = F × d

power = work donetime taken

PEt

=

gravitational potential energy = mass × gravitational field strength × vertical height GPE = m × g × h

kinetic energy = ½ × mass × velocity2 KE = ½ × m × v2

3

*S39596A0320* Turn over

Answer ALL questions

Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross .

Using radiation

1 (a) Complete the sentences by putting a cross ( ) in the box next to your answer.

(i) Radioactive sources can emit alpha or beta or gamma radiation.

An alpha particle is(1)

A a helium nucleus

B a neutron

C a proton

D an electron

(ii) A gamma ray is (1)

A an electromagnetic wave

B a stream of charged particles

C emitted from stable nuclei

D non-ionising radiation

4

*S39596A0420*

(iii) The activity of a radioactive source changes with time.

Which of these graphs is correct for a radioactive source?

Put a cross ( ) in the box next to your answer.(1)

activity

0time

C

activity

0time

D

activity

0

A

activity

0

Btime time

5

*S39596A0520* Turn over

(b) In the past, people thought that radiation could cure many illnesses. Some people drank water from containers lined with the radioactive element

radium.

Complete the sentence by putting a cross ( ) in the box next to your answer.

Today we have laws and rules about how radioactive sources are used and handled.

This is because(1)

A doctors are better trained now

B radioactive sources have become more dangerous

C the dangers of radioactive sources are better understood now

D we can work out the half-life of radioactive sources

(c) Radioactivity is used to sterilise medical equipment such as syringes. The syringes are sealed in strong packets. They are then sent past a source of gamma rays.

Explain why gamma rays are used for sterilising medical equipment.(2)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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6

*S39596A0620*

(d) Describe one other use of a radioactive source.(2)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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(Total for Question 1 = 8 marks)

7

*S39596A0720* Turn over

Stopping a car

2 (a) The chart shows how the speed of a car affects the thinking distance and the braking distance.

(i) When the speed is 40 km/h, what is the thinking distance?(1)

thinking distance = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . m

(ii) Calculate the thinking distance when the speed is 80 km/h.(2)

thinking distance = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . m

speed in km/h

thinking braking distance/mdistance/m

30

40

50

60

70

80

90

100

6 5

8 9

10 14

12 20

14 26

36

8

*S39596A0820*

(iii) The total stopping distance of the car is the thinking distance plus the braking distance.

Calculate the total stopping distance at 60 km/h.(1)

total stopping distance = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . m

(b) As a car becomes old, its braking system wears. This makes the brakes less effective.

Describe the effect, if any, that worn brakes have on both the thinking distance and the braking distance.

(2)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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(c) A car takes 9 m to stop after the driver applies the brakes. The brakes exert a force of 2000 N.

Calculate how much work is done by this force.(2)

work done = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J

(Total for Question 2 = 8 marks)

9

*S39596A0920* Turn over

Using electrical heating

3 Victor rides a motorbike. He buys a kit to heat its handlebars in winter.

The kit has two handle bar grips. Each grip contains an electrical heating coil.

(a) Complete the sentence by putting a cross ( ) in the box next to your answer.

When the coils are switched on, they get hot because(1)

A current is lost in the coils

B energy is transferred in the coils

C resistance is transferred in the coils

D atoms flow through the coils

10

*S39596A01020*

(b) The kit also has a three position switch and a 2.4 ohm resistor.

The diagram shows how Victor connects the parts.

Victor wants to check the voltage of the battery. Add a meter to the diagram to show how to measure the battery voltage.

(2)

(c) Victor moves the switch to the ‘high heat’ position. The 12 V battery produces a current of 2.5 A in the circuit.

(i) Calculate the electrical power produced. (2)

electrical power = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W

left coil

switch

right coil

2.4 ohm resistor

off

12 V

low heat

high heat

11

*S39596A01120* Turn over

(ii) R = V / I

Calculate the total resistance of the circuit.(2)

total resistance = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ω

(d) Victor moves the switch to the ‘low heat’ position. The grips do not get as hot.

Explain why the grips are not as hot.(2)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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(e) The 2.4 ohm resistor must be fixed somewhere on the motorbike frame where it cannot be touched by the rider.

Suggest a reason why.(1)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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(Total for Question 3 = 10 marks)

12

*S39596A01220*

Forces and motion

4 (a) The diagram shows some of the forces acting on an airliner in flight. The airliner is flying at a constant height above the ground. Only two of the forces acting on the airliner are shown.

(i) Use words from the box to label the diagram. (2)

(ii) Draw another arrow on the diagram to show the friction forces acting on the airliner.

(1)

(iii) The airliner is accelerating.

Which of these statements is correct for the accelerating airliner?

Put a cross ( ) in the box next to your answer. (1)

A the friction forces are zero

B the thrust is greater than the friction forces

C the thrust is smaller than the friction forces

D the thrust is the same size as the friction forces

thrust drag lift weight

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

*S39596A01320* Turn over

(b) This is a photograph of one of the airliner’s jet engines.

(i) When the fuel burns, hot exhaust gases are forced backwards out of the engine.

Explain why this creates a forward thrust. (2)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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(ii) When the airliner is taking off it accelerates along the runway. It starts from rest and takes off 50 seconds later. Its speed at take off is 60 m/s.

Calculate its average acceleration along the runway.(2)

acceleration = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . m/s2

14

*S39596A01420*

(iii) If the same airliner carries fewer passengers but uses the same engine thrust, it can take off in a shorter time.

Explain why. (2)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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(Total for Question 4 = 10 marks)

15

*S39596A01520* Turn over

Nuclear fission

5 (a) A student produced this poster to give information about a typical nuclear fission.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

One word is incorrect in each of the numbered boxes.

(i) Circle the incorrect word in each box.

Box 1 has been done for you.(1)

(ii) Write the correct word in the space under each box.

Box 1 has been done for you.(2)

neutron

1a proton is

captured andthe nucleus

splits

2when the

nucleus splits, energy is absorbed

3two parent nuclei are produced

4three more protons are

released

U–235

16

*S39596A01620*

(b) The diagram shows an outline of a nuclear reactor.

When the control rods are lowered the reactor does not produce much thermal energy.

Explain what happens when the control rods are raised.(3)

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control rod

moderator

fuel rod

shielding

hot water out

reactor vessel

cold water in

17

*S39596A01720* Turn over

*(c) Used nuclear fuel is removed from a reactor for reprocessing. The workers who remove the fuel are at risk.

Explain how the safety precautions the workers take help to reduce the risks.(6)

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(Total for Question 5 = 12 marks)

18

*S39596A01820*

Electrostatic discharge

6 (a) Marie works in an office which has a nylon carpet. She walks across the carpet towards her filing cabinet.

There is friction between her shoes and the carpet. When she touches the metal handle of her filing cabinet she feels an electric

shock.

(i) State the name of the charged particles which have been transferred between the carpet and her shoes.

(1)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(ii) The following sentences explain how Marie got the electric shock. The sentences are in the wrong order. Put them in the correct order by numbering the boxes. Two have been done for you.

(2)

actions order in which the actions happen

Marie walks across the nylon carpet 1

charge flows from Marie to the filing cabinet

Marie touches the handle 4

charge is transferred by friction on to Marie

Marie has lost her negative charge

a negative charge builds up on Marie

19

*S39596A01920* Turn over

(b) Marie has another filing cabinet which has a black conductive strip at the top. This black strip helps to prevent electric shocks. This strip has a high resistance but still conducts charge.

If Marie touches the strip before touching the handle she does not feel a shock.

Explain, using the idea of electric current, why Marie does not feel a shock.(3)

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black conductive strip

20

*S39596A02020*

*(c) Sparks from electrostatic discharge can sometimes be very dangerous. They can cause a fire or an explosion.

Safety precautions are taken to reduce risks.

Explain how safety precautions, in a particular situation, reduce the risks of fire or explosion.

You may draw a labelled diagram to help with your answer.(6)

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(Total for Question 6 = 12 marks)

TOTAL FOR PAPER = 60 MARkS

Additional Sample Mark Scheme

GCSE Science 2011

GCSE

GCSE Physics (5PH2F/01)

Edexcel Limited. Registered in England and Wales No. 4496750 Registered Office: One90 High Holborn, London WC1V 7BH

5PH2F/01 Additional Sample Mark scheme

General Marking Guidance

• All candidates must receive the same treatment. Examiners must mark the first candidate in exactly the same way as they mark the last.

• Mark schemes should be applied positively. Candidates must be rewarded for what they have shown they can do rather than penalised for omissions.

• Examiners should mark according to the mark scheme not according to their perception of where the grade boundaries may lie.

• There is no ceiling on achievement. All marks on the mark scheme should be used appropriately.

• All the marks on the mark scheme are designed to be awarded. Examiners should always award full marks if deserved, i.e. if the answer matches the mark scheme. Examiners should also be prepared to award zero marks if the candidate’s response is not worthy of credit according to the mark scheme.

• For questions worth more than one mark, the answer column shows how partial credit can be allocated. This has been done by the inclusion of part marks eg (1).

• Where some judgement is required, mark schemes will provide the principles by which marks will be awarded and exemplification may be limited.

• When examiners are in doubt regarding the application of the mark scheme to a candidate’s response, the team leader must be consulted.

• Crossed out work should be marked UNLESS the candidate has replaced it with an alternative response.

Quality of Written Communication

Questions which involve the writing of continuous prose will expect candidates to:

• Write legibly, with accurate spelling, grammar and punctuation in order to make the meaning clear

• Select and use a form and style of writing appropriate to purpose and to complex subject matter

• Organise information clearly and coherently, using specialist vocabulary when appropriate.

Full marks will be awarded if the candidate has demonstrated the above abilities.

Questions where QWC is likely to be particularly important are indicated (QWC) in the mark scheme, but this does not preclude others.

5PH2F/01 Additional Sample Mark scheme

General Information The following symbols are used in the mark schemes for all questions:

Symbol Meaning of symbol

eq Indicates that credit should be given for other correct alternatives to a word or statement

/ oblique Words or phrases separated by an oblique are alternatives to each other

curly brackets

Indicate the beginning and end of a list of alternatives (separated by obliques) where necessary to avoid confusion

( ) round brackets

Words inside round brackets are to aid understanding of the marking point but are not required to award the point

5PH2F/01 Additional Sample Mark scheme

Question Number

Answer Acceptable answers Mark

1(a)(i) A (1)

Question Number

Answer Acceptable answers Mark

1(a)(ii) A (1)

Question Number

Answer Acceptable answers Mark

1(a)(iii) C (1)

Question Number

Answer Acceptable answers Mark

1(b) C (1)

Question Number

Answer Acceptable answers Mark

1(c) An explanation linking two of the following points

• (gamma) will penetrate packaging (1)

• (to) destroy microorganisms

(1)

• (by) ionisation (1)

(2)

5PH2F/01 Additional Sample Mark scheme

Question Number

Answer Acceptable answers Mark

1(d) A description including the following points

• clear statement of application (1)

• detail about how it works /

type of radiation used / purpose (1)

e.g. in a smoke alarm alpha source is used gamma rays are used to kill cancer cells food is irradiated to make it last longer check the thickness of paper

by measuring how much radiation gets through it

(2)

Question Number

Answer Acceptable answers Mark

2(a)(i) 8 (m) (1)

(1)

Question Number

Answer Acceptable answers Mark

2(a)(ii) • indication that speed has doubled (1)

• so thinking distance has

doubled (eg 2 x 8) (1)

bald answer of 16 (m) gets both marks

(2)

Question Number

Answer Acceptable answers Mark

2(a)(iii) 32 (m) (1)

(1)

Question Number

Answer Acceptable answers Mark

2(b) A description including the following points

• thinking distance is unchanged (1) • braking distance increases (1)

(2)

5PH2F/01 Additional Sample Mark scheme

Question Number

Answer Acceptable answers Mark

2(c) substitution (1) 2000 × 9 evaluation (1) 18 000 (J)

18 (kJ) give full marks for correct answer, no working

(2)

5PH2F/01 Additional Sample Mark scheme

Question Number

Answer Acceptable answers Mark

3(a) B (1)

Question Number

Answer Acceptable answers Mark

3(b) • voltmeter symbol (1) • connected across battery (1)

(2)

Question Number

Answer Acceptable answers Mark

3(c)(i) substitution (1) 2.5 x 12 evaluation (1) 30 (W)

give full marks for correct answer, no working

(2)

Question Number

Answer Acceptable answers Mark

3(c)(ii) substitution (1) 12 ÷ 2.5 evaluation (1) 4.8 (Ω)

give full marks for correct answer, no working

(2)

Question Number

Answer Acceptable answers Mark

3(d) An explanation linking any two of the following points

• greater resistance in the circuit (1)

• less current (in the circuit) (1)

• less energy transfer in the

coils (1)

• less voltage across the coils (1)

• less power generated in the

coils (1)

(2)

5PH2F/01 Additional Sample Mark scheme

Question Number

Answer Acceptable answers Mark

3(e) Any one from the following points

• heat will be generated in the resistor

• it will get hot

• could burn the rider

(1)

5PH2F/01 Additional Sample Mark scheme

Question Number

Answer Acceptable answers Mark

4(a)(i)

• thrust (to right) (1)

• weight (downwards) (1)

(2)

Question Number

Answer Acceptable answers Mark

4(a)(ii)

horizontal arrow drawn pointing to the left and starting from some point on the ‘airliner’ (need not have a label)

both start and end of arrow could be on the airliner

(1)

Question Number

Answer Acceptable answers Mark

4(a)(iii) B (1)

Question Number

Answer Acceptable answers Mark

4(b)(i) An explanation linking two of the following points

• there is a reaction force (1) • (which) acts on the engine /

airliner (1)

• (must be) in the opposite direction (to that on the gases) (1)

(2)

Question Number

Answer Acceptable answers Mark

4(b)(ii) substitution (1) 60 ÷ 50 evaluation (1) 1.2 (m/s2)

give full marks for correct answer, no working

(2)

5PH2F/01 Additional Sample Mark scheme

Question Number

Answer Acceptable answers Mark

4(b)(iii) An explanation linking two of the following points

• weight /mass will be reduced (1)

• (so) greater acceleration

(from same force) (1) • (therefore) will need less lift

to achieve take off (1)

take off at lower velocity / speed / reduces take off speed sooner

(2)

5PH2F/01 Additional Sample Mark scheme

Question Number

Answer Acceptable answers Mark

5(a)(i) • box 2: absorbed circled • box 3: parent circled • box 4: protons circled

All three points correct for 1 mark

(1)

Question Number

Answer Acceptable answers Mark

5(a)(ii) • box 2: released • box 3: daughter • box 4: neutron(s)

Note: 3 correct for 2 marks 2 correct for 1 mark 1 correct for 0 marks

(2)

Question Number

Answer Acceptable answers Mark

5 (b) An explanation linking three of the following points

• fewer neutrons captured (1)

• (therefore) more fission reactions take place (1)

• energy is released during

fission reaction (1)

• (hence) temperature goes up (1)

more neutrons available for fission reactions idea of (controlled ) chain reaction

(3)

5PH2F/01 Additional Sample Mark scheme

Question Number

Indicative content Mark

QWC

*5(c) An explanation linking some of the following points Risks

• fuel rods have high temperature when removed from reactor • different types of ionising radiation produce different dangers • energy from the ionising radiation can be absorbed by the human

body • (prolonged) exposure to radiation can cause tissue / cell damage

and mutation / damage to DNA • increased risk due to long term exposure to raised background

levels of radiation • damage to rods during transport • leak from reactor / rods / reprocessing unit

Safety precautions

• appropriate working practices should be adopted – protective clothing and handling systems should be used

• people working with radioactive material should minimise their exposure to the ionising radiation

• intensity of radiation decreases with distance from the source • personal radiation dose should be monitored • monitoring of background levels of radiation • use of canister to carry fuel rods

(6)

Level 0 No rewardable material 1 1-2 • a limited explanation of risk or precautions e.g. alpha particles can cause

cancer • the answer communicates ideas using simple language and uses limited

scientific terminology • spelling, punctuation and grammar are used with limited accuracy

2 3-4 • some explanation of risk and precaution e.g. idea of relative dangers of some ionising radiations and some sensible suggestions regarding working practice

• the answer communicates ideas showing some evidence of clarity and organisation and uses scientific terminology appropriately

• spelling, punctuation and grammar are used with some accuracy 3 5 - 6

• a detailed explanation of appropriate precautions clearly linked to risks (ORA)

e.g. idea that intensity of radiation decreases according to the nature of the medium through which it is travelling therefore the canister should be of a high density material in order to reduce escape of ionising radiation

• the answer communicates ideas clearly and coherently uses a range of scientific terminology accurately

• spelling, punctuation and grammar are used with few errors

5PH2F/01 Additional Sample Mark scheme

Question Number

Answer Acceptable answers Mark

6(a)(i) electrons (1)

Question Number

Answer Acceptable answers Mark

6(a)(ii) • row 4 and 6 labelled 2,3 (1)

• row 2 and 5 labelled 5,6 (1)

(2)

Question Number

Answer Acceptable answers Mark

6(b) An explanation linking three of the following

• charge flows from Marie through the conductive strip (1)

• this constitutes an electric

current (1) • the (relatively) high

resistance of the strip means that the current is (relatively) small (1)

• compared with the (larger)

current which would flow through the metal handle (1)

• idea of earthing (1) • Marie no longer charged when

she touches the handle (1)

(3)

5PH2F/01 Additional Sample Mark scheme

Question Number

Indicative content Mark

QWC

*6(c) An explanation linking some of the following points

• a clear statement of the situation being considered • an explanation of how the electrostatic charge would build up if no

safety precaution was taken • an explanation of why a spark is generated • a statement about the consequences of this spark resulting in the

ignition of the combustible / flammable source • detail of the safety precaution • an explanation of electrostatic processes with the safety precaution

in place. • a statement that the previously identified risk is now reduced

(6)

Level 0 No rewardable material 1 1-2 • a simple explanation or a diagram of a potentially dangerous situation with

either a statement of a possible consequence or a relevant safety precaution • the student uses everyday language and the response lacks clarity and

organisation • spelling, punctuation and the rules of grammar are used with limited accuracy

2 3-4 • some explanation or a partially labelled diagram of the situation and some explanation of how the charge would build up in the unprotected situation linked to a relevant safety precaution or an explanation of how this results in a controlled discharge or prevents the charge separation in the first place

• the student uses some technical terms and shows some clarity and organisation

• spelling, punctuation and the rules of grammar are used with some accuracy 3 5 - 6

• a detailed explanation or a fully labelled diagram of the situation and

explanation of how the charge would build up in the unprotected situation clearly linked to a relevant safety precaution and explanation of how this results in a controlled discharge or prevents the charge separation in the first place

• the student uses a range of technical terms and shows good clarity and organisation

• spelling, punctuation and the rules of grammar are used with considerable accuracy