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©MoEAC/NIED JS Physical Science Specimen Paper [Turn over
Name……………………………………… School ……………………………… Grade 9 ..…
JUNIOR SECONDARY
SEMI-EXTERNAL EXAMINATION
PHYSICAL SCIENCE
PAPER - Written 2 hours 30 minutes
Marks 130 Specimen Paper
Additional Materials: Soft pencil (HB type is recommended)
Non-programmable calculator
INSTRUCTIONS AND INFORMATION TO CANDIDATES
- Learners answer on the Question Paper in the spaces provided.
- Write your Name in the space at the top of this page.
- Write in dark blue or black pen.
- You may use a soft pencil for any rough work, diagrams or graphs.
- Do not use correction fluid.
- Do not write in the margin For Examiner’s Use.
- Answer all questions.
- Answer section A on the multiple choice answer sheet provided.
- The number of marks for section B is given in brackets [ ] at the end of each question or part question.
- The Periodic Table is printed on page 24.
For Examiner’s Use
Section A Section B
Total
This document consists of 25 printed pages and 1 blank page.
Republic of Namibia
MINISTRY OF EDUCATION, ARTS AND CULTURE
JS Physical Science Specimen Paper
SECTION A: MULTIPLE CHOICE QUESTIONS
- Answer this section on the multiple choice answer sheet provided.
- For each question there are four possible answers A, B, C and D.
- Choose the one you consider correct and mark your choice in soft pencil on the separate answer sheet.
- Each question counts one mark.
- If you want to change an answer, erase completely the one you wish to delete.
1 The diagram shows the set up of an experiment.
What is the main purpose of the experiment?
A To find the density of the stone. B To find the mass of the stone. C To find the temperature of the stone. D To find the volume of the stone.
2 Which of the following is a way of finding the exact value of a quantity?
A classification B estimation C measurement D observation
3 How many hours are equivalent to15 minutes?
A 0.15 hours B 0.25 hours C 15.0 hours D 900 hours
JS Physical Science Specimen Paper
7 The diagram shows the electronic structure of sodium atom.
What is the nucleon number of sodium atom?
A 11
B 12
C 23
D 24
8 The diagrams show different molecules.
Which diagram shows a diatomic element?
9 Most inorganic fertilisers contain the compound ammonium nitrate. Ammonium nitrate
is made up of ammonium (NH 4 +) ions and nitrate (NO 3 - ) ions.
What is the chemical formula for ammonium nitrate?
A (NHNO) 7
B NH 3 NO 4
C NH 4 NO 3
D NHNO
10 Acids are common in fruits.
Which acid is found in fruits?
A acetic acid
B citric acid
C lactic acid
D nitric acid
JS Physical Science Specimen Paper [Turn over
11 What is the colour of a universal indicator in pure water?
A green
B orange
C red
D violet
12 The diagram shows a pH scale indicating different substances.
Which combination of substances represents a weak acid and a strong base?
A W and Y
B W and Z
C X and Y
D X and Z
13 Which process can be used to control the pH of acidic soil?
A combustion
B decomposition
C neutralisation
D respiration
14 Which gas is produced when zinc granule reacts with dilute sulfuric acid?
A carbon dioxide
B hydrogen
C oxygen
D sulfur dioxide
JS Physical Science Specimen Paper [Turn over
19 A girl of 400 N walks up a stair case as shown in the diagram.
How much gravitational potential energy does she gain as she reaches the top level? A 120 J B 200 J C 400 J D 1200 J
20 The diagram shows a car tyre.
Which statement explains why the car tyres are made with deep grooves on their surfaces? A To decrease friction. B To decrease pressure C To increase pressure. D To increase friction.
21 Which process is described as the spreading of particles of one substance amongst
the particles of another substance?
A compression
B contraction
C diffusion
D Expansion
JS Physical Science Specimen Paper
22 The diagram shows phase changes.
In which phase changes do particles gain energy? A 1 and 2 B 1 and 3 C 2 and 3 D 3 and 4
23 The diagram shows a 200 g rectangular block with dimensions 5 cm x 2 cm x 3 cm.
What is the density of the rectangular block? A 0.15 g/cm^3 B 6.67 g/cm^3 C 20.0 g/cm^3 D 33.3 g/cm^3
24 A syringe contains a gas of volume 40 cm^3. This volume is reduced to 20 cm^3. The
temperature remains the same.
How does the gas pressure and collision of particles in the syringe change?
gas pressure collisions of particles
A (^) decreases decrease B decreases increase C increases increase D increases decrease
JS Physical Science Specimen Paper
28 Which connection ensures that all other bulbs remain lighted after any one of the bulbs
breaks?
29 Which of the following is a source of chemical energy that can be used to produce
electrical energy?
A candle B cell C sun D water
30 The planet Earth behaves like a bar magnet.
Which diagram shows a bar magnet that represents the Earth’s magnet?
JS Physical Science Specimen Paper [Turn over
For examiner’s use
SECTION B: STRUCTURED QUESTIONS
- Write your answers in the spaces provided on the question paper.
- Legible handwriting and neat drawings in pencil, where required, are essential.
- Answers to numerical calculations must have the correct unit.
- Symbols must be written/drawn correctly.
- Incorrect spelling of element names and scientific terminology will be penalised.
1 The diagram shows the setup used to determine the mass of a liquid.
(a) Identify the instrument used to measure the mass of the liquid. …………………………………………………………………………………...…….. [1] (b) Find the volume of the liquid.
volume……….…………………… cm^3 [1] (c) Determine the mass of the liquid. Show your working.
mass ……………….. g [2] (d) (i) Calculate the density of the liquid.
density =………….…… g/cm^3 [2] (ii) Deduce whether the liquid will float or sink in water. Explain your answer. …………………………………………………………………………………... …………………………………………………………………………………… [2] [8]
For examiner’s Use
JS Physical Science Specimen Paper [Turn over
For examiner’s use
3 Changes in nature can be classified as physical or chemical.
(a) Give two differences between a physical and chemical change. 1 ………………………………………………………………………………………… …………………………………………………………………………………………. 2………………………………………………………………………………………… …………………………………………………………………………………….....… [2]
(b) State whether the following changes are chemical or physical. (i) fruit ripening …………………………………………………….………………… [1] (ii) ice cube melting ………………………………………………………………..… [1]
(c) The diagrams X, Y and Z are examples of chemical reactions.
(i) Identify the chemical reactions represented by X, Y and Z as decomposition, synthesis or combustion reaction. X ……………………………………………………………………………....... Y ……………………………………………………………………………....... Z ……………………………………………………………………………........ [3]
(ii) Burning a match is an exothermic reaction. Explain what is meant by exothermic reaction. ……………….………………………………………………………………..… …………………………………………………………………………………… [1] [8]
For examiner’s Use
JS Physical Science Specimen Paper
4 In an experiment, a learner is given a sample of each of the following substances to
determine whether they are acidic, basic or neutral.
The table shows her results after testing the samples with litmus papers.
sample
effect on blue litmus paper
effect on red litmus paper nature of sample
fanta cool drink (i) …………. remains red acidic
distilled water remains blue remains red (ii) ……………
soap water remains blue (iii) ……………. basic
vinegar turns red remains red (iv) ……………
eno solution (v) …………… (vi) ………….. basic
lemon juice turns red remains red (vii) …………….
(a) Fill in (i), (ii), (iii), (iv), (v), (vi) and (vii) to complete the table. [7]
(b) Hydrochloric acid reacts with calcium carbonate to form carbon dioxide gas and two other products. (i) Name the two other products formed. 1 ................................................................................................................. [1] 2 ................................................................................................................. [1]
(ii) Describe the test for carbon dioxide gas. Test………………..……………………………………...……………………... [1] Result …………………………………………………………...………………. [1]
(c) Distinguish between weak acids and strong acids in terms of the pH scale.
weak acids …………………………….…………………….................................... ............................................................................................................................ [1] strong acids …………………………………………………………………………………………. ............................................................................................................................ [1] [13]
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JS Physical Science Specimen Paper
(e) The diagram shows burning wood. Wood contains carbon.
(i) Complete the word equation for the complete combustion of carbon.
carbon + …………….... ………………………… [2]
(ii) Suggest the effect of non-metal oxides on rain water.
….……………………………………………………………………………..…… [1]
[12]
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JS Physical Science Specimen Paper [Turn over
For examiner’s use
6 The diagram shows a builder using a pulley to lift a 50 kg pile of bricks through a height
of 3 m at a construction site.
(a) State the difference between mass and weight.
………………………………………….……………………………………………….
………………………………………………………………………………………….. ………………………………………......……………………………….……………..
…………………………………………………………………………………..……… [2] (b) Calculate the weight of the 50 kg pile of bricks.
Weight = ……………….. N [2]
(c) (i) State the formula of work done.
…...………………………………………………………………………………... [1]
(ii) Calculate work done by the builder when he lifted the pile to the height
of 3 m. State the unit.
Work done = …………………. unit …….. [3]
[8]
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JS Physical Science Specimen Paper [Turn over
For examiner’s use
(b) The diagram shows two containers, one filed with water and one with milk.
(i) Compare the pressure at B and D in water. Explain your answer. ........................................................................................................................
........................................................................................................................ [2]
(ii) Compare the pressure at C in water and at C in milk. Explain your answer. ……………………………………………………………………………...……….
……………...……………………………………………………………………..… [2]
(iii) State two applications of hydrostatic pressure in everyday life. 1.....................................................................................................................
2...................................................................................................................... [2]
(c) A canoe floats in the river as shown in the diagram.
Explain why a canoe floats on water. ……………..…………………………………………………………………………
………………………………………………………………………………………. [2]
[13]
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JS Physical Science Specimen Paper
8 (a) The diagram shows a representation of a positively charged piece of
material.
(i) Suggest how the piece of material was charged. ………………………………………………………………………………..…..
…………………………………………………............................................... [1] (ii) A positively charged balloon is brought near the positively charged object shown.
State, with a reason, what happens between the balloon and the piece of material. ………………………………………………………………………………..…..
…………………………………………………………………………...……….
…………...……………………………………………………………………..... [2]
(iii) On the diagram, insert enough negative charges (−) to make the object neutral. [1]
For examiner’s Use
