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This document consists of 5 printed pages and 1 blank page. © UCLES 2011 [Turn over UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS Cambridge Checkpoint SCIENCE 1113/02 Paper 2 For Examination from 2012 SPECIMEN MARK SCHEME 45 minutes MAXIMUM MARK: 50

2 © UCLES 2011 1113/02/SM/12 Question 1 Part Mark Answer Further Information (a) 1 indicators (b) 1 blue (c) 1 purple (d) 1 sodium hydrogencarbonate Total 4 Question 2 Part Mark Answer Further Information (a) (i) (ii) 3 1 6 correctly drawn bars 20 6 correct bars = 3 marks 4 or 5 correct bars = 2 marks 2 or 3 correct bars = 1 mark 0 / 1 correct bars = 0 mark (b) 1 second two boxes ticked if first box ticked = 0 mark both correct = 1 mark (c) 2 idea of colonising new areas idea of reducing competition Total 7 Question 3 Part Mark Answer Further Information (a) 1 The Earth spins on its axis once every 24 hours. (b) 1 both Luca and Anya (c) 1 Earth and Jupiter underlined if three or more names underlined = 0 mark Total 3

3 © UCLES 2011 1113/02/SM/12 [Turn over Question 4 Part Mark Answer Further Information (a) 1 D (b) 1 A (c) 1 B Total 3 Question 5 Part Mark Answer Further Information (a) 2 has steel wire / should have copper wire introduces another variable / changing too many things (b) (i) (ii) (iii) (iv) 2 1 1 1 table has 2 ruled rows and 7 ruled columns (or vice versa) + each column or row headed with units all values correctly entered the more coils, the greater the mass of iron filings 15 coils/23 g repeat the experiment all correct = 2 marks 2 errors = 1 mark more than 2 errors = 0 mark accept converse Total 7

4 © UCLES 2011 1113/02/SM/12 Question 6 Part Mark Answer Further Information (a) (i) (ii) 1 1 the wolf is bigger / has a more powerfully built body / larger head / jaws or vice versa They are distinct and cannot interbreed. / They do not produce fertile offspring. Allow any feature visible on the diagrams. (b) (i) (ii) 1 2 Variation / diversity Domestic dogs have been bred by people. People have selected characteristics. Accept the converse. Total 5 Question 7 Part Mark Answer Further Information (a) 1 movement/kinetic (b) 1 heat/thermal (c) 1 light (d) 1 light (e) 1 potential Total 5

5 © UCLES 2011 1113/02/SM/12 Question 8 Part Mark Answer Further Information (a) (i) (ii) (iii) 2 1 1 cabbage – caterpillar – bird – snake bird / snake cabbage if order reversed = 1 mark (b) 1 go down (less food) / stay the same (eat other things) Accept either or both alternatives. Total 5 Question 9 Part Mark Answer Further Information (a) (i) (ii) 1 2 exothermic sodium hydroxide hydrogen (b) 2 burning neutralisation if 3 ticks = 1 mark Total 5 Question 10 Part Mark Answer Further Information (a) (i) (ii) 1 1 A B (b) 1 heat / warm (c) (i) (ii) (iii) 1 1 1 C diffusion they are moving / in motion Total 6

6 © UCLES 2011 1113/02/SM/12 BLANK PAGE