Aqa Mark Scheme Isa Biology

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Surname Centre Number Candidate Signature

Other Names Candidate Number Date

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General Certificate of Secondary Education June 2008 / June 2009 SCIENCE / BIOLOGY ISA B2.2 Photosynthesis ASCC/BLYC/B2.2

To be conducted before 4 May 2009 For submission in May 2008 or May 2009 or May 2010 For this paper you must have: • results tables and charts or graphs from your own investigation. You may use a calculator.

For Teacher’s Use

Section

Mark

1 Time allowed: 45 minutes Instructions • Use blue or black ink or ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions in Section 1 and Section 2. • Answer the questions in the spaces provided. • Do all rough work in this book. Cross through any work you do not want to be marked. Information • The maximum mark for this paper is 34. • The marks for questions are shown in brackets. • You are reminded of the need for good English and clear presentation in your answers. 2 Total (max 34)

Did this candidate take part in the practical activity?

YES / NO

Signature of teacher marking this ISA ....................................................................

Date ......................

SA8212/Jun08/ASCC/BLYC/B2.2

ASCC/BLYC/B2.2

2 SECTION 1 These questions are about the investigation that you did. Answer all questions in the spaces provided.

LEAVE MARGIN BLANK

1 What were you trying to find out in your investigation? ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... ..................................................................................................................................................... (2 marks)

2 (a)

In your investigation, what was the independent variable (the variable that you deliberately changed)? ........................................................................................................................................... (1 mark)

(b)

(i)

How many different values of this variable were used?.......................................... (1 mark)

(ii) Suppose you could choose one more value of this variable to use. What value would you choose? .................................................................................................................................. Give a reason for your answer. .................................................................................................................................. .................................................................................................................................. (1 mark)

3 State one variable that you needed to measure during your investigation. ..................................................................................................................................................... (1 mark)

SA8212/Jun08/ASCC/BLYC/B2.2

3 4 Suggest why you needed to wait a short time before you collected results each time you changed the value of your independent variable. ..................................................................................................................................................... ..................................................................................................................................................... (1 mark)

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5 Suggest one way of making your investigation more accurate. ........................................................................................................................................................
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