UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE
Joint Examination for the School Certificate
and General Certificate of Education Ordinary Level
AGRICULTURE
5038/3
PAPER 3 Practical Test
CONFIDENTIAL INSTRUCTIONS
OCTOBER/NOVEMBER SESSION 2001
1 hour 15 minutes
Great care should be taken that any confidential information given
does not reach the candidates either directly or indirectly.
Instructions for preparing apparatus
These instructions give details of the apparatus, reagents and specimens required by each candidate
for each experiment in this paper. A summary of the questions that will be presented to the candidates
is included, where appropriate, to allow the teacher to test the apparatus appropriately. No access to
the question paper is permitted in advance of the examination session.
It is assumed that the ordinary apparatus of a science laboratory will be available, including a supply of
purified water (distilled or deionised).
If arrangements are made for different sessions for different groups of candidates, care must be taken
to ensure that the different groups of candidates are effectively isolated so that no information passes
between them.
All specimens should carry only the code letters and numbers as indicated and their identity
should not be revealed to the candidates.
Supervisors should ensure that all specimens have the correct identity attached to the specimen and
that these are not removed or altered during the examination.
If you have any problems or queries regarding these Instructions, please contact CIE
by e-mail:
International@ucles.org.uk,
by phone:
+44 1223 553554,
by fax:
+44 1223 553558,
stating the Centre number, the nature of the query and the syllabus number quoted above.
These instructions consist of 3 printed pages and 1 blank page.
SB (SM) QK11357/3
© UCLES 2001
http://www.xtremepapers.net
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For Question 1
Each candidate will require:
(i)
a hand lens of not less than x6 magnification, labelled with the magnification factor;
(ii)
access to a water-bath, the water temperature between 85 °C and 100 °C, capable of holding
test-tubes;
(iii)
two clean test-tubes;
(iv)
forceps;
(v)
a white tile;
(vi)
ethanol, labelled ethanol;
(vii)
a source of water;
(viii)
iodine dissolved in potassium iodide solution, labelled iodine solution;
(ix)
a stopclock, stopwatch or view of a clock with second hand.
Specimens
AS1, leaves from a dicotyledenous plant that has been allowed to photosynthesise for 24 hours.
The plant should be a species with an obvious difference between the upper and lower leaf
surfaces.
AS2, leaves from a plant of the same species that has been kept in the dark for at least 24 hours
to prevent photosynthesis.
Procedure to be followed by candidates
Candidates will be required to make a drawing of the lower surface of the leaf specimen, AS1. The
candidates will also be required to test AS1 and AS2 for starch.
For Question 2
Each candidate will require:
(i)
stiff card, larger than 60 mm x 80 mm;
(ii)
scissors;
(iii)
a 300 mm rule;
(iv)
a clamp stand;
(v)
a large pin or nail strong enough to support a plumb line;
(vi)
a plumb line (approximately 200 mm long), labelled plumb line.
Procedure to be followed by candidates
Candidates will be required to find the centre of gravity of a piece of card.
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For Question 3
Each candidate will require:
(i)
two clean boiling tubes;
(ii)
a source of water.
Specimens
AS3, a soil sample with a high sand and/or gravel content.
AS4, a soil sample with a high clay content or one that is significantly less sandy than AS3.
Procedure to be followed by candidates
Candidates will be required to investigate two soil samples, AS3 and AS4.
The Supervisor’s Report is to be filled in on the back page of the first candidate’s script. Please
ensure that this is done.
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BLANK PAGE
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