2019_Combined science_olevel_mj_paper3

Extracted Content: 2019_Combined science_olevel_mj_paper3

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For Performa:

ZIMBABWE SCHOOL EXAMINATIONS COUNCIL

General Certificate of Education Ordinary Level

COMBINED SCIENCE 4003/3

PAPER 3 (Practical Test)

JUNE 2019 SESSION 1 hour 30 minutes
Candidates answer on the question paper
Additional materials:

As listed in instructions to Supervisors
Calculator (optional)

INSTRUCTIONS TO CANDIDATES
Write your name, centre number and candidate number in the spaces at the top of this page.

Answer both questions.
Write your answers in the spaces provided on the question paper.
Use a sharp pencil for your drawings. Coloured pencils or crayons should not be used.

You should record all experimental results and show the essential steps in any calculation in the
spaces provided in the question paper.

FOR EXAMINER’S USE
INFORMATION FOR CANDIDATES

1
The number of marks is given in brackets [ ] at the end of 2

each question or part question. TOTAL

Copyright: Zimbabwe School Examinations Council, J2019.

© ZIMSEC J2019

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1 You are required to identify nutrients present in juice X. You are provided with three boiling tubes, a test tube rack, a pair of tongs, a graduated syringe, Benedict's solution, hot water bath, juice X, solution P, solution R and access to a clock.

(a) (0) Carry out the tests described in Table 1.1 below and record the observations
and deductions in the table.

Table 1.1

test observations conclusions

Add about 2 cm? of juice X into a boiling
tube and add two drops of solution R to the

juice.

Place about 2 cm} of juice X into a clean
boiling tube and add about 2 cm’ of
Benedict's solution to the juice.

Heat the mixture in a water bath.
Place about 3 cm’ of juice X into a clean

boiling tube and add about 4 cm’ of solution
P to the juice.

Place the test tube in the hot water bath and
leave it for about 3 minutes.

After the 3 minutes, pour about half of the

contents into another clean boiling tube.

Add two drops of solution R to one of the
portions.

Add about 2 em’ of Benedict's solution to the
other portion and heat in the water bath.

4003/3 J2019

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(b)

(i)

ii)

(iv)

(v)

(vi)

(vii)

(viii)

Identify solution R.

State the process responsible for the change that occurred when
solution P was added to the juice and the mixture heated.

Name the part of the alimentary canal where the process
mentioned in (vii) occurs.

State any two precautions that should be taken when carrying out the
experiment.

4003/3 J2019

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(a) You are required to determine the resistance of a wire, R. Fig.2.1 shows the circuit diagram for the circuit which the supervisor set for you.

cell holder Jf
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wn

Fig.2.1

Place one cell in the cell holder, close the switch and record the voltmeter and

ammeter readings in Table 2.1.

Repeat the procedure adding one cell at a time until you use four cells.

Table 2.1

number of cells

voltage/V

current/A

[10]

4003/3 J2019

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Plot a graph of voltage (y-axis) against current (x-axis).

(i)

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[3]

State the relationship between voltage and current.

(ii)

[1]

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(iv) Calculate, using the graph, the resistance of wire R.

[2]

(vy) Determine, clearly showing on the graph, the current when the
voltage is 3.5 V.

(b) State any two sources of error in the experiment.

4003/3 32019

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ive

ees:
ZIMBABWE SCHOOL EXAMINATIONS COUNCIL
General Certificate of Education Ordinary Level

COMBINED SCIENCE 4003/1
PAPER | Multiple Choice

NOVEMBER 2019 SESSION 1 hour
Additional materials:
Multiple Choice answer sheet
Soft clean eraser
Soft pencil (type B or HB is recommended.)
Calculator (Optional)

INSTRUCTIONS TO CANDIDATES

Do not open this booklet until you are told to do so.

Write your name, centre number and candidate number on the answer sheet in the spaces
provided unless this has already been done for you.

Read very carefully the instructions on the answer sheet.

INFORMATION FOR CANDIDATES

Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
Any rough working should be done in this booklet.

There are forty questions in this paper. Answer all questions. For each question, there are

four possible answers, A, B, C and D. Choose the one you consider correct and record your
choice in soft pencil on the separate answer sheet provided.

Copyright: Zimbabwe School Examinations Council, N2019.

© ZIMSEC N19

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