2019_Combined science_olevel_mj_paper2

Extracted Content: 2019_Combined science_olevel_mj_paper2

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~ Surname Forename(s) Centre Number Candidate Number

Fur Performance Measurement

ZIMBABWE SCHOOL EXAMINATIONS COUNCIL

General Certificate of Education Ordinary Level

COMBINED SCIENCE 4003/2

PAPER 2 Theory

JUNE 2020 SESSION 2 hours

Candidates answer on the question paper

Additional materials: Calculator (Optional)

Allow candidates 5 minutes to count pages before the examination.

The Periodic Table is provided on page 16.
INSTRUCTIONS TO CANDIDATES

Write your name, centre number and candidate number in the spaces at the top.
Ask the invigilator for a replacement if there are missing pages.
Write your answers in the spaces provided on the question paper.

Section A
Answer all questions.

FOR EXAMINER USE
SECTION A

B7

Section B

Answer any two questions. B9

C10
Section C cil

Answer any two questions. C12

D13
Section D D14

Answer any two questions. p15

TOTAL

| eee eee

INFORMATION FOR CANDIDATES
The number of marks is given in brackets [ ] at the end of each question.

This question paper consists of 16 printed pages.

Copyright: Zimbabwe School Examinations Council, J2020.

& PIMGEC 12020 [Turn over }
RR ea

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(b)

(c)

@

ii)

@

2

Section A

stions in this section in the

Answer all the que. spaces provided.

Fig. 1.1 shows a human tooth.

Fig. 1.1

Name the tooth shown.

State the function of the tooth.

Explain the importance of mechanical digestion.

State the end product(s) of the digestion of

proteins,

4003/2 42020

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3 (a) State any one natural method of contraception.

(b) Describe how the pill prevents pregnancy.

(c)

Fig 3.1 shows the blast furnace used in the extraction of iron.

Cc

waste gases <——

top of furnace

hot air-——>

(a) (i) Identify substances A and B.

4003/2 $2020 ;
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(ii) Cis a mixture of three raw materials.

erial in the mixture.

State any one raw mat

he furnace.

i of tl
(b) Describe the reaction which occurs near the top

Nitrogen gas and hydrogen gas react in a reversible reaction to produce

ammonia gas.

(a) Define the term reversible reaction.

(b) Write a balanced chemical equation for the production of ammonia gas.

() =i)

(3)

(ii) Explain how any one of the condition

: ; 8 named in (i) | «ance j
yield of ammonia. (i) leads to an increase in the

4003/2 2020

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(a). (i) (ii) (b) (c) (d)

Define the term

momentum,

inertia.

State the difference between mass and weight.

State Newton’s first law of motion.

2
A ball of mass 0.4 kg accelerates uniformly at 2 m/s .

Calculate the force of the ball.

[3]

4003/2 12020
[Turn ever

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6

ta boarding school
(a) Fig.6.1 shows power demand between 6 am a pm a
which uses only electricity as its source of €

power 20
demand/

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0600 0 800 1 000 1 200 1400 1 600

time of the day

Fig.6.1

(i) Use Fig.6.1 to identify the time of the day with the highest power demand.

(ii) The meal times for the boarding school are:

breakfast at 0700
lunch at 1300
supper at 1700

Explain why there is a high power demand at 1200.

(iii) | Describe how the school may reduce the amount of electricity they use per
day.

4003/2 192020

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(b) State the SI unit of mass and power.

mass

4003/2 J2020

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