Centre Number
Candidate
Number
Candidate Name
UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE
Joint Examination for the School Certificate
and General Certificate of Education Ordinary Level
AGRICULTURE
PAPER 3 Practical Test
OCTOBER/NOVEMBER SESSION 2001
5038/3
1 hour 15 minutes
Candidates answer on the question paper.
Additional materials:
As listed in Instructions to Supervisors
TIME
1 hour 15 minutes
INSTRUCTIONS TO CANDIDATES
Write your name, Centre number and candidate number in the spaces at the top of this page.
Answer all questions.
Write your answers in the spaces provided on the question paper.
Use sharp pencils for your drawings. Coloured pencils or crayons should not be used.
INFORMATION FOR CANDIDATES
The number of marks is given in brackets [ ] at the end of each question or part question.
FOR EXAMINER’S USE
1
2
3
TOTAL
This question paper consists of 6 printed pages, 1 blank page and a Supervisor’s Report.
SB (SM) QK11359/3
© UCLES 2001
http://www.xtremepapers.net
[Turn over
For
Examiner’s
Use
2
Answer all the questions.
Write your answers in the spaces provided.
1
AS1 and AS2 are leaves from two plants of the same species.
(a) (i)
Use a hand lens to examine AS1 and then make a drawing of a section of the lower
surface of AS1. Labels are not required.
State the magnification of the hand lens. .................................................................
[3]
(ii)
List two observable differences between the upper and the lower surface of AS1.
1.
...........................................................................................................................
...................................................................................................................................
2.
...........................................................................................................................
...............................................................................................................................[2]
(b) Use forceps to place AS1 into the bottom of a test-tube and half fill the test-tube with
water. Place the test-tube in the water-bath. After three minutes, carefully remove AS1
from the test-tube and empty the water.
Repeat this procedure using AS2.
(i)
Describe one change in AS1 after this process.
...................................................................................................................................
...............................................................................................................................[1]
Replace AS1 in a test-tube and half-fill it with ethanol. Replace the test-tube in the
water-bath and leave for 15 minutes.
Repeat this procedure with AS2.
You should begin Question 2 or Question 3 while the test-tubes are in the waterbath.
After 15 minutes, carefully remove the test-tube from the water-bath and use forceps to
remove AS1. Rinse AS1 in water to soften the leaf and then spread AS1 on to a tile.
Repeat this procedure with AS2.
5038/3/O/N/01
For
Examiner’s
Use
3
(ii)
Describe AS1 after this process.
...............................................................................................................................[1]
Cover AS1 and AS2 with iodine solution and leave for two minutes.
(iii)
Complete the results table in Fig. 1.1.
item
colour
iodine solution
red / brown
AS1
AS2
[2]
Fig. 1.1
(iv)
Which leaf contains starch? .................................................................................[1]
(v)
Suggest two reasons why one of the leaves does not contain starch.
1.
...........................................................................................................................
...................................................................................................................................
2.
...........................................................................................................................
...............................................................................................................................[2]
(vi)
List two safety precautions that you have taken during this experiment.
1.
...........................................................................................................................
...................................................................................................................................
2.
...........................................................................................................................
...............................................................................................................................[2]
5038/3/O/N/01
[Turn over
For
Examiner’s
Use
4
2
You are going to cut out this shape from card and find its centre of gravity.
60 mm
B
A
80 mm
C
D
(a) Draw this shape on to card and cut it out, using scissors.
Measure the distance AC on your card.
distance AC = .............................. mm
[1]
(b) Insert a pin at any point five mm from point A. Attach the plumb line to the pin and hang
the card from the stand by the pin. Mark the position Z on the card where the plumb line
crosses the edge of the card. The pinhole must be large enough to allow the card to
move freely.
Insert the pin at any point five mm from point B. Attach the plumb line to the pin and
hang the card from the stand by the pin. Mark the position Y on the card where the
plumb line crosses the edge of the card.
5038/3/O/N/01
5
(i)
Place your card in the space below and draw around the card. Label the drawing with
letters A to D. Mark Y and Z and the position of the two pin holes on the drawing.
For
Examiner’s
Use
[3]
(ii)
Complete the drawing to find the centre of gravity of this shape and label it.
(iii)
Describe how the centre of gravity could be lowered (moved closer to edge CD).
[2]
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[2]
5038/3/O/N/01
[Turn over
For
Examiner’s
Use
6
3
AS3 and AS4 are two samples of soil.
Put AS3 into a boiling tube to a depth of approximately 25 mm. Fill the boiling tube with cold
water. Shake the tube so that the contents are mixed thoroughly. Leave the boiling tube to
settle for four minutes.
Repeat this test with AS4.
(a)
Make a labelled drawing of the two boiling tubes after the contents have settled.
[4]
(b)
Suggest two properties of soil sample AS4. Give your reasons.
property ...........................................................................................................................
reason .............................................................................................................................
..........................................................................................................................................
property ...........................................................................................................................
reason .............................................................................................................................
......................................................................................................................................[4]
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7
BLANK PAGE
5038/3/O/N/01
8
SUPERVISOR’S REPORT
*The Supervisor or Teacher responsible for the subject is asked to answer the following questions.
1
Was any difficulty experienced in providing the necessary materials? Give brief details.
2
Did the candidate experience any difficulty during the course of the examination? If so, give brief
details. Reference should be made to
(a) difficulties arising from faulty specimens;
(b) accidents to apparatus or materials;
(c) any information that is likely to assist the Examiner, especially if this cannot be discovered
from the scripts.
3
For Question 1, state the identity of the plant used for AS1 and AS2 specimens.
common name ...................................................................
scientific name ..................................................................
Declaration to be signed by the Principal, and completed on the top script from the Centre
The preparation of the Practical Test has been carried out so as to fully maintain the security of the
examination.
Signed.......................................................................................................................................................
Centre Number ........................................................................ School ...................................................
*Information that applies to all candidates need only be given once.
5038/3/O/N/01