Gcse Exam Science Essay

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GCSE Additional Science Physics 2 Higher Tier Physics 2H SPECIMEN MARK SCHEME Version 1.0

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Quality of Written Communication and levels marking In Question 2(c) candidates are required to produce extended written material in English, and will be assessed on the quality of their written communication as well as the standard of the scientific response. Candidates will be required to: • use good English • organise information clearly • use specialist vocabulary where appropriate. The following general criteria should be used to assign marks to a level: Level 1: basic • Knowledge of basic information • Simple understanding • The answer is poorly organised, with almost no specialist terms and their use demonstrating a general lack of understanding of their meaning, little or no detail • The spelling, punctuation and grammar are very weak. Level 2: clear • Knowledge of accurate information • Clear understanding • The answer has some structure and organisation, use of specialist terms has been attempted but not always accurately, some detail is given • There is reasonable accuracy in spelling, punctuation and grammar, although there may still be some errors. Level 3: detailed • Knowledge of accurate information appropriately contextualised • Detailed understanding, supported by relevant evidence and examples • Answer is coherent and in an organised, logical sequence, containing a wide range of appropriate or relevant specialist terms used accurately. • The answer shows almost faultless spelling, punctuation and grammar. In order to attain a mark within a certain level, both the science and the QWC must be of a standard appropriate to that level.

GCSE Additional Science Physics 2 Specimen Mark Scheme Higher Tier V1.0

COMPONENT NUMBER: PH2HP COMPONENT NAME: GCSE Additional Science Physics 2H STATUS: Specimen V1.0 question 1(a)(i) answers spilling boiling / hot water suitable precaution to reduce risk from hot water eg clamp the probe / complete the experiment standing extra information accept any sensible suggestion accept any sensible answer but must be linked to the named risk mark 1 1

1(a)(ii)

3 (V)

allow 1 mark for substitution into correct equation ie 0.5 × 6

2

1(b)(i)

resistance of thermistor decreases therefore the current in the circuit increases causing a bigger share of the p.d. across 6 Ω resistor

1 1 1

1(b)(ii)

0 – 100 (°C)

accept 10 – 100 oC

1

1(b)(iii)

20°C to 40 °C because a small temperature change gives a bigger voltmeter reading change

1 1

1(c)

thermostat

accept a correct description of a use

1

Total

11

GCSE Additional Science Physics 2 Specimen Mark Scheme Higher Tier V1.0

COMPONENT NUMBER: PH2HP COMPONENT NAME: GCSE Additional Science Physics 2H STATUS: Specimen V1.0 question 2(a) Y and Z same number of protons answers extra information both required, either order mark 1 1

2(b)

fusion energy

correct order only

1 1

2(c) Marks awarded for this answer will be determined by the Quality of Written Communication (QWC) as well as the standard of the scientific response. Examiners should also refer to the information on page 2. 0 marks No relevant content. Level 1 (1-2 marks) There is a brief description of the life cycle of a star like the sun. Level 2 (3-4 marks) There is some description of the life cycle of a star like the sun. Level 3 (5-6 marks) There is a clear and detailed description of the life cycle of a star like the sun.

examples of the physics points made in the response

extra information to score full marks either the term red giant or white dwarf must be used

• • • • • • • • • •

gases and dust pulled together by gravity nuclear fusion begins…