junior secondary certificate · 2014-08-19 · junior secondary certificate physical science 1210/1...

JSC 2013, Physical Science [Turn over[Turn over

INSTRUCTIONS AND INFORMATION TO CANDIDATES

• Candidates answer on the Question Paper in the spaces provided.• Write your Candidate Number and Name in the spaces 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.• Donotusecorrectionfluid.• Do not write in the margin For Examiner’s Use.

• Answer all questions.

• Make sure that you receive the multiple choice answer sheet with your Candidate Number on it to answer section A.

• 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 23.

This document consists of 22 printed pages and 1 blank page.

Republic of NamibiaMINISTRY OF EDUCATION

For Examiner’s Use

Marker

Checker

© MoE/DNEA

Candidate Number Candidate Name

JUNIOR SECONDARY CERTIFICATEPHYSICAL SCIENCE 1210/1PAPER−Written 2hour30minutes

Marks 130 2013

AdditionalMaterials:Non-programmablescientificcalculator

2

JSC 2013, Physical Science

2

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.• Each question counts one mark.• If you want to change an answer, erase the one you wish to delete completely.

1 What is the length of the piece of string between point X and Y?

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 cm

YX

string

A 12.2 cm

B 12.4 cm

C 13.2 cm

D 13.4 cm

2 Three learners were asked to describe the particle arrangement in liquid and in solid. Their answers are given in the table.

learner answerI liquid particles are further apart and

move around at randomII solid particle are closer together and

vibrateaboutafixedpositionIII both liquid and solid particles move

around at random

Which learner(s) correctly describe the particle arrangement in liquid and in solid?

A I only

B I and II only

C II only

D II and III only

3

JSC 2013, Physical Science [Turn over

3 Whichrowinthetableshowsanelement,acompoundandamixture?

element compound mixture

A carbondioxide carbon sea water

B carbon carbondioxide sea water

C carbon sea water carbondioxide

D sea water carbondioxide carbon

4 The diagram shows an outline of part of the Periodic Table.

G

Which diagram shows an atomic structure of element G?

A B C D

key electrons nucleus

5 Which properties correctly describes transitional metals?

A metals with high boiling points and forms colourless compounds

B metals with high boiling points and forms coloured compounds

C metals with low boiling points and forms colourless compounds

D metals with low boiling points and forms coloured compounds

4


6 What is the name given to Group VII elements?

A alkali

B halogens

C inert gases

D noble gases

7 A calcium ion is Ca2+ and a chloride ion is Cl−?

What is the formula for calcium chloride?

A CaClB Ca2ClC CaCl2

D Ca2Cl2

8 Which property of aluminium makes it suitable for aeroplane parts?

A good conductor

B high melting point

C high reactivity

D low density

9 Which steel is commonly used for manufacturing spoons, forks and knives?

A cobalt steel

B hard steel

C mild steel

D stainless steel

10 What is the main use of polythene?

A to make clothes

B to make plastic bags

C tomakeroofingmaterials

D to make car tyres

11 What is the advantageofusinggrass(thatch)forroofingofbuildings?A It is a good insulator.

B Itcatchesfire.

C It is durable.

D Itisexpensive.

5


12 Which structure shows the particle arrangements in melamine?

A B

C D

13 Which of the following is a chemical change?

A burning wood

B ice melting

C salt dissolving in water

D water evaporating

14 Inhumanstomach,hydrochloricacidreactswithmagnesiumhydroxide,inanantacid, as shown in the word equation below.

hydrochloricacid+ magnesiumhydroxide→substanceY + water

What is substance Y?

A chlorine gas

B hydrogen gas

C magnesium

D magnesium chloride

15 Which row in the table correctly shows the change in volume and density of water when it is cooled from 4°C to 0°C?

volume density

A decrease increase

B decrease decrease

C increase decrease

D increase increase

6


16 The property of any physical object to resist change in its state of motion is called...

A inertia.

B mass.

C speed.

D weight.

17 Which of the following force is a non-contact force?

A air resistance

B frictional force

C magnetic force

D tension force

18 A Grade 10 learner uses her thumb to push a drawing pin into a soft board.

soft board

drawing pin head

Whichstatementexplainsthedifferencebetweenthepressureonthepinheadand the pressure on the soft board?

A The pressure on the pin head is greater because the surface area is larger.

B The pressure on the pin head is greater because the surface area is smaller.

C The pressure on the soft board is greater because the surface area is larger.

D The pressure on the soft board is greater because the surface area is smaller.

19 What is the unit of work done?

A joule

B newton

C pascal

D watt

7


20 A girl of 400 N walks up a stair case as shown in the diagram.

3 m5 m

top level

How much gravitational potential energy does she gains as she reaches the top level?

A 120 J

B 200 J

C 400 J

D 1200 J

21 The diagram shows a lighted torch.

What are the energy changes in lighting a torch?

A chemicalpotential→electrical→light

B chemicalpotential→light→electrical

C light→electrical→chemicalpotential

D light→chemicalpotential→electrical

22 When a plastic rod is rubbed, it becomes positively charged because

A it gains electrons.

B it gains protons.

C it loses electrons.

D it loses protons.

23 Which instrument is used to measure electric current?

A an ammeter

B an ohmmeter

C a thermometer

D a voltmeter

8


24 The diagram shows a glowing bulb.

A soft plastic insulator

C hard plastic lamp holder

B bare copper wires

D glass bulb

Which part of the diagram could be of danger when touched by a person?

25 In the circuit diagrams below, the ammeter readings and the potential difference are given.

In which circuit does the resistor R have the largest resistance?

A

R

6 V

3 A

A

A

R

6 V

4 A

B

A

R

6 V

1.5 A

C

A

R

6 V

6 A

D

26 Inanexperimentastudentplacesthreecompassesaroundeachpoleofabarmagnet.

Which diagram represents what the student observes?

N S N S

A B

N S N S

C D

9


27 Whichrowinthetablecorrectlyshowsanexampleofalongitudinalwaveandanexampleofatransversewave.

longitudinal transverse

A light radio

B radio sound

C sound water

D water light

28 Whatistheapproximaterangeofaudiblefrequenciesforthehumanear?

A 2 Hz to 2 000 Hz

B 2 Hz to 20 000 Hz

C 20 Hz to 2 000 Hz

D 20 Hz to 20 000 Hz

29 Which statement describes the properties of the image formed in a plane mirror?

A The image is real and inverted.

B The image is real and upright.

C The image is virtual and inverted.

D The image is virtual and upright.

30 Shortsightedness in human is corrected by using

A concave lens.

B convexlens.

C curved mirror.

D plane mirror.

10


ForExaminer's

UseSECTION 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.• Incorrectspellingofelementnamesandscientificterminologieswillbepenalised.

1 Carbon is in Group IV of the Periodic Table. C126 and C14

6 are some of the isotopes of carbon.

(a) Use the Periodic Table on page 23, to give one metal which is in the same Period as carbon.

.................................................................................................................. [1]

(b) (i) Calculate the number of neutrons of C126 and C14

6 .

neutrons of C126 =................................neutrons of C14

6 = ..................... [2]

(ii) Explainwhy C126 and C14

6 are said to be isotopes.

...........................................................................................................

........................................................................................................... [1]

(c) Carbonreactswithoxygentoformcarbondioxide.

(i) Statethetypesofbondsformedbetweencarbonandoxygenincarbondioxide.

........................................................................................................... [1]

(ii) Thediagramshowsanincompletestructureofoxygenmolecule(outer shells only).

Complete the structure. [2]

O O

(d) C146 isradioactive.Explainwhatismeantbyradioactive decay.

..................................................................................................................

.................................................................................................................. [2]

[9]

11


ForExaminer's

Use

[Turn over

2 InanexperimentJohncomparestheinsulationofthreematerials.He was given the following:

• materials S, T and R • boiling water and an empty glass beaker• a thermometer

He poured hot water in the beaker and measured the drop in temperature at differentintervals,firstwhenthebeakerisunwrappedandthenwhenwrappedwith different materials.

The result is shown in the diagram.

tem

pera

ture

/ °C

0

10

20

30

40

50

60

70

80

90

100

10 20 30 40 50 60time in minutes

unwrapped beaker

beaker wrapped with material S

beaker wrapped with material T

beaker wrapped with material R

(a) Determine the temperature of the beaker wrapped with material T at 60 minutes.

.................................................................................................................. [1]

(b) State the purpose of the unwrapped beaker.

.................................................................................................................. [1]

(c) State the material that was the worst insulator.

.................................................................................................................. [1]

(d) It is given that the three materials are a piece of wool, a piece of polyester and a piece of polythene. UsethisinformationandtheexperimentalresultstoidentifymaterialsS, T and R.

S =.....................................................T= ..................................................

R = ........................................................................................................... [3]

[6]

12


ForExaminer's

Use3 (a) The table shows a few metals with their properties.

Match each metal with its property, by drawing a line connecting the metal and the property. One has been done for you. [2]

property of metal metalfound uncombined in the earth crust aluminiumextracted by electrolysis ironused in electrical wiring sodiumreact vigorously with water copperits ore is haematite gold

(b) Calcium reacts with hydrochloric acid as shown by the incomplete word equation below.

(i) Complete the equation.

calcium+hydrochloricacid→ ............................... + hydrogen gas [1]

(ii) Outline the chemical test for hydrogen.

Test..................................................................................................... [1]

Results ...............................................................................................

........................................................................................................... [1]

(c) Stainless steel (an alloy of iron) and aluminium are commonly used in making cooking pots.

(i) Definethewordalloy.

...........................................................................................................

........................................................................................................... [1]

(ii) Give anotherexampleofalloysofiron.

........................................................................................................... [1]

(iii) State two properties of stainless steel and aluminium that make them suitable materials for making cooking pots.

1 .........................................................................................................

2 ......................................................................................................... [2]

[9]

13


ForExaminer's

Use

[Turn over

4 The diagram shows a structure of a house. Structure Z is made of concrete. The list of different building materials is given below.

W

Y

Z

X

List: cement, wood, corrugated iron, glass, grass, gravel (crushed stones), water, plastic, concrete, sand, bricks.

Use the diagram and the list of building materials given to answer the questions.

(a) Name two materials that could be used for structure W.

1 ................................................................................................................

2 ................................................................................................................ [2]

(b) Name the materials that X and Y are usually made off.

X................................................................................................................

Y................................................................................................................ [2]

(c) Explainhowconcreteismade.

..................................................................................................................

..................................................................................................................

.................................................................................................................. [3]

(d) State the other material on the building that can be made from concrete.

.................................................................................................................. [1]

[8]

14


ForExaminer's

Use5 Copper (II) sulfate can be prepared by adding copper (II) carbonate powder to

sulfuric acid.

The diagram shows the reaction.

copper (II) carbonate

sulfuric acid

bubbles forms

(a) State the observation that shows that a gas is released during the reaction.

.................................................................................................................. [1]

(b) Complete the chemical reaction.

CuCO3 + H2SO4→.............................+H2O + ................................. [2]

(c) The reaction between copper (II) carbonate and sulfuric acid is an acid-base reaction. State the special name given to this kind of reactions.

.................................................................................................................. [1]

(d) With reference to the pH values distinguish between weak and strong acid. Give oneexampleineachcase.

weak acid ..................................................................................................

..................................................................................................................

exampleofweakacid ...............................................................................

strong acid ................................................................................................

..................................................................................................................

exampleofstrongacid .............................................................................. [4]

[8]

15


ForExaminer's

Use

[Turn over

6 The pie chart shows the percentage composition of air.

oxygen

other gases 1%

gas X 78%

(a) (i) Identify gas X.

........................................................................................................... [1]

(ii) ExplaintheadvantageofhavinggasX in higher concentration than oxygen.

...........................................................................................................

........................................................................................................... [2]

(b) (i) Describethecommercialpreparationofoxygenfromliquidair.

...........................................................................................................

........................................................................................................... [2]

(ii) State twousesofoxygengas.

1 .........................................................................................................

2 ......................................................................................................... [2]

(c) Excesscarbondioxidecausesacidrainwhichdissolvescalciumandmagnesium salts in the rocks. This causes hardness of water.

(i) Distinguish between temporary and permanent hard water.

temporary hard water .........................................................................

...........................................................................................................

permanent hard water ........................................................................

........................................................................................................... [2]

(ii) State any other gas that causes acid rain.

........................................................................................................... [1]

[10]

16


ForExaminer's

Use

16

7 The diagram shows a cyclist cycling on a straight road between point A and B. Point B is 600 m from point A. He takes 40 s to cycle between point A and B.

AB600 m

(a) Explainthedifferencebetweenspeedandvelocity.

..................................................................................................................

..................................................................................................................

.................................................................................................................. [2]

(b) Calculate the average speed of the cyclist between point A and B. State the unit.

average speed ............................. [3][5]

8 Use the terms in the table to answer questions (a) and (b).

kinetic, elastic potential, chemical potential, nuclear fuel,

wind energy, solar energy, fossil fuel, heat, light

(a) (i) The energy due to motion is called ..................................energy. [1]

(ii) The energy that is converted to .........................................energy when

burning wood is called ...............................................................energy. [2]

(b) State twoexamplesofrenewableenergysourceandoneexampleofnon-renewable energy source.

renewable: 1..............................................2 ............................................ [1]

non-renewable .......................................................................................... [1]

[5]

17


ForExaminer's

Use

[Turn over

9 The diagram shows a crane lifting a 120 kg block of concrete. The crane takes 24 s to lift the block to the height of 16 m.

120 kg

16 m

(a) (i) Calculate the weight of the block of concrete.

weight ........................................N [2]

(ii) Other than the weight, state two other forces acting on the block of concrete as it is lifted.

1 .........................................................................................................

2 ......................................................................................................... [2]

(b) (i) State the formula for calculating work done.

........................................................................................................... [1]

(ii) Calculate the work done on the block of concrete as it is lifted to a distance of 16 m.

work done ...............................Nm [2]

(c) Calculate the power out-put of the crane when lifting the block of concrete to the height of 16 m in 24 s. State the formula of power, show your working and state the unit.

formula of power = .................................................................................... [1]

power =........................unit .......... [3][11]

18


ForExaminer's

Use

18

10 The circuit diagram shows two bulbs of the same resistance connected to a 6 V battery. The bulbs are also labelled 40 W.

6 V

B1 B2

(a) A charge of 5 Coulombs passes through the circuit in 2 seconds. Calculate the total current in the circuit.

current = ................................... A [2]

(b) Use your answer in (a) to calculate the total resistance in the circuit. State the unit.

resistance =......................unit ..... [3]

(c) (i) On the diagram draw a circuit symbol of the voltmeter to show how it can be connected to measure the voltage across bulb B1 only. [2]

(ii) Explainhowthetotalcurrentinthecircuitchangesafteranotheridentical bulb B3 is connected in series with bulbs B1 and B2.

...........................................................................................................

...........................................................................................................

...........................................................................................................

........................................................................................................... [2]

(d) Explainwhatthelabel40 W on the bulbs mean.

..................................................................................................................

.................................................................................................................. [2]

[11]

19


ForExaminer's

Use

[Turn over

11 The diagram shows a bar magnet.

N S

(a) On the diagram draw at least threefieldlines,witharrows,toshowthedirectionofthemagneticfieldaroundthebarmagnet. [2]

(b) (i) Distinguish between a ferrous and a nonferrous material.

...........................................................................................................

........................................................................................................... [1]

(ii) Give twoexamplesofaferrousmaterial.

........................................................................................................... [2]

(c) When a bar magnet is inserted in and out of a coil, an electric current is produced.

coil

S N

X

(i) State the name of the component labelled X.

........................................................................................................... [1]

(ii) Explainwhathappenstotheneedleofthecomponent X when the bar magnet is moved in and out of the coil.

...........................................................................................................

........................................................................................................... [2]

[8]

20


ForExaminer's

Use

20

12 The bar graph shows the speed of sound through different materials.

0

1000

2000

3000

4000

5000

6000sp

eed

of s

ound

/ m

/s

air helium alcohol water gold glass iron granite

gas liquid solid

(a) (i) Write down the speed of sound in iron.

........................................................................................................... [1]

(ii) Select the material in which the speed of sound is about 1 500 m/s.

........................................................................................................... [1]

(b) Stateandexplainthestateofmatterinwhichsoundtravelthefastest.

Answer ...................................................................................................... [1]

Explanation ...............................................................................................

.................................................................................................................. [2]

[5]

21


ForExaminer's

Use

[Turn over

12 Thediagramshowsanobjectreflectedinaplanemirror.

incident ray

S

30°

reflected

ray

object image

line T

(a) State the names of line T and angle S.

line T .........................................................................................................

angle S ...................................................................................................... [2]

(b) (i) Suggest the value of angle S.

........................................................................................................... [1]

(ii) Give a reason to your answer in (b)(i).

...........................................................................................................

........................................................................................................... [1]

(c) State the natural phenomenon that occurs as a result of refraction of light in air.

.................................................................................................................. [1]

[5]

22

BLANK PAGE


23


DATA

SHE

ETTh

e Per

iodi

c Tab

le of

the E

lemen

ts

Grou

p

III

IIIIV

VVI

VII

0

1 HHy

drog

en1

4 He Heliu

m2

7 LiLit

hium

3

9 BeBe

rylliu

m4

11 BBo

ron

5

12 CCa

rbon

6

14 NNi

troge

n7

16 OOx

ygen

8

19 FFl

uorin

e9

20 Ne Neon

10

23 NaSo

dium

11

24 MgMa

gnes

ium12

27 AlAl

umini

um13

28 SiSi

licon

14

31 PPh

osph

orus

15

32 SSu

lfur

16

35,5 Cl

Chlor

ine17

40 Ar Argo

n18

39 KPo

tass

ium19

40 CaCa

lcium

20

45 ScSc

andiu

m21

48 TiTit

anium

22

51 VVa

nadiu

m23

52 CrCh

romi

um24

55 MnMa

ngan

ese

25

56 Fe Iron

26

59 Co Coba

lt27

59 Ni Nick

el28

64 Cu Copp

er29

65 Zn Zinc

30

70 Ga Galliu

m31

73 GeGe

rman

ium32

75 As Arse

nic33

79 SeSe

lenium

34

80 BrBr

omine

35

84 KrKr

ypto

n36

85 RbRu

bidium

37

88 SrSt

ront

ium38

89 YYt

trium

39

91 ZrZi

rcon

ium40

93 NbNi

obium

41

96 MoMo

lybde

num

42

TcTe

chne

tium

43

101

RuRu

then

ium44

103

RhRh

odium

45

106 Pd

Palla

dium

46

108

Ag Silve

r47

112 Cd

Cadm

ium48

115 In

Indiu

m49

119 Sn Tin

50

122 Sb

Antim

ony

51

128 Te

Tellu

rium

52

127 I

Iodin

e53

131 Xe Xe

non

54

133 Cs

Caes

ium55

137 Ba Ba

rium

56

139 La

Lant

hanu

m57

*

178 Hf

Hafn

ium72

181 Ta

Tant

alum

73

184 W

Tung

sten

74

186 Re

Rhen

ium75

190

OsOs

mium

76

192 Ir

Iridiu

m77

195 Pt

Plat

inum

78

197

Au Gold

79

201

HgMe

rcur

y80

204 Tl

Thall

ium81

207 Pb Le

ad82

209 Bi

Bism

uth

83

PoPo

lonium

84

AtAs

tatin

e85

Rn Rado

n86

FrFr

anciu

m87

226 Ra

Radiu

m88

227 Ac

Actin

ium89

†

*58 -

71 L

anth

anoi

d se

ries

†90 -

103 A

ctin

oid

serie

s14

0 Ce Ceriu

m58

141 Pr

Pras

eody

mium

59

144

NdNe

odym

ium60

PmPr

omet

hium

61

150

SmSa

mariu

m62

152 Eu

Euro

pium

63

157

GdGa

dolin

ium64

159 Tb

Terb

ium65

162 Dy

Dysp

rosiu

m66

165

HoHo

lmium

67

167 Er

Erbiu

m68

169

Tm Thuli

um69

173 Yb

Ytte

rbium

70

175 Lu

Lute

tium

71

Key

a X

b

a =

relat

ive a

tomi

c mas

sX

= at

omic

symb

olb

= pr

oton

(ato

mic)

num

ber

232 Th

Thor

ium90

PaPr

otacti

nium

91

238 U

Uran

ium92

NpNe

ptuniu

m93

PuPl

utoniu

m94

AmAm

erici

um95

Cm Curiu

m96

BkBe

rkeli

um97

CfCa

liforn

ium98

EsEi

nste

inium

99

FmFe

rmium

100

MdMe

ndele

vium

101

NoNo

beliu

m10

2

LrLa

wren

cium

103

The

volum

e of

one

mole

of a

ny g

as is

24

dm3 a

t roo

m te

mper

atur

e an

d pr

essu

re (r

.t.p.

).

junior secondary certificate · 2014-08-19 · junior secondary certificate physical science 1210/1...

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