Cambridge International Examinations Cambridge Secondary 1 ...

Cambridge International Examinations Cambridge Secondary 1 Checkpoint

SCIENCE Paper 2

MARK SCHEME Maximum Mark: 50

1113/02 April 2018

Published This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Markers were instructed to award marks. It does not indicate the details of the discussions that took place at an Markers' meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes should be read in conjunction with the question paper and the End of Series Report. Cambridge will not enter into discussions about these mark schemes.

IB18 05_1113_02/RP ? UCLES 2017

This document consists of 16 printed pages.

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1113/02 Annotations and abbreviations

Checkpoint Secondary 1 Science ? Mark Scheme PUBLISHED

April 2018

/ OR alternate responses for the same marking point

( ) the words or units in brackets do not need to be stated

Accept an acceptable response

Do not accept indicates an incorrect response that would contradict another otherwise correct alternative

Ignore indicates an irrelevant answer that is not creditworthy, however, full marks can still be achieved even with the answers that are ignored

ecf error carried forward, marks are awarded if an incorrect response has been carried forward from earlier working, provided the subsequent working is correct ora or reverse argument note provides extra information when necessary

?UCLES 2018

Page 2 of 16

1113/02 Question 1(a)(i) 1(a)(ii)

1(b)

protein

Checkpoint Secondary 1 Science ? Mark Scheme PUBLISHED

April 2018

Answer

Marks

Further Information

1 Note if more than one food group given = 0 for the question

muscle is made of protein / needed for growth / needed for repair

any two from (idea of) contains carbohydrate provides (lots of) energy needed for respiration

1 Accept develops muscle / strengthens muscles / for muscles

Accept for cell division / make new cells / regenerate muscles quicker

2

Accept contains carbs / (starch) broken down into glucose or sugar

?UCLES 2018

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1113/02 Question 2(a)

2(b)

Checkpoint Secondary 1 Science ? Mark Scheme PUBLISHED

April 2018

Answer

Gases can flow to fill a container. Gases only form at temperatures above 100?C. The particles in a gas are arranged randomly. The particles in a gas are close together. The particles in a gas can only vibrate.

Marks

Further Information

2 each correct tick = 1 mark

three ticks and two correct = 1 mark

three ticks and one correct = 0 marks

four or five ticks = 0 marks

any two from

particles lose energy / (some) particles have less kinetic energy / (some) particles move slower

(idea of) forces between particles increase / greater attraction between particles

particles have moved closer together / distance between particles is smaller

2 Note the answer should refer to particles, atoms or molecules

Accept intermolecular forces increase or get bigger

?UCLES 2018

Page 4 of 16

1113/02

Question 3

Checkpoint Secondary 1 Science ? Mark Scheme PUBLISHED

April 2018

Answer

Marks

Further Information

The sound with a higher pitch than A is E.

4 each correct sentence = 1 mark

The sound with a larger volume (louder) than A is

B.

The sound with a smaller frequency than A is D.

The sound with a smaller amplitude than A is C.

?UCLES 2018

Page 5 of 16

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