Igcse Combined Science Papers

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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education

*8621469522*

COMBINED SCIENCE CO-ORDINATED SCIENCES Paper 6 Alternative to Practical

0653/06 0654/06
May/June 2009 1 hour

Candidates answer on the Question paper No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. At the end of the examination, fasten all your work securely together. The number of marks
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3.2 time t / s distance / cm 0 0 Fig. 3.2 (a) The images of the trolley and the metre rule at t = 0.1, 0.2 and 0.3 s are shown in Fig. 3.3. Read the scales and record the distances in centimetres in Fig. 3.2. [3] 0.1 0.2 0.3 0.4 76 0.5 96

marker

t = 0.1 s

cm

0

10

20

marker

t = 0.2 s

10

20

30

40

marker

t = 0.3 s

30

40

50

60

Fig. 3.3
© UCLES 2009 0653/06/M/J/09

9 (b) Plot a graph of distance moved in centimetres (vertical axis) against time t in seconds (horizontal axis) on the grid provided. Draw a smooth curve through the points. [3]
For Examiner's Use

Fig. 3.4

(c) Show that the trolley accelerates as it moves along the track. You may show this on the graph or write an explanation below.

[2]

© UCLES 2009

0653/06/M/J/09

[Turn over

10 (d) The student wants to change the mass of the trolley and the 1 kg mass. Suggest how the results will change if (i) the trolley has a mass of 2 kg instead of 1 kg,
For Examiner's Use

[1] (ii) the 1 kg hanging mass is replaced by a 2 kg mass.

[1]

© UCLES 2009

0653/06/M/J/09

11 4 Hydrogen peroxide is produced in some living cells during chemical reactions. It is poisonous if it is not removed quickly. The enzyme catalase is also found in living cells. It speeds up the breakdown of hydrogen peroxide to produce oxygen gas. A student carried out an
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