JUNIOR SECONDARY CERTIFICATE · 2014-08-19 · JUNIOR SECONDARY CERTIFICATE PHYSICAL SCIENCE 1210/1...
Transcript of 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
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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
JSC 2013, Physical Science
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
JSC 2013, Physical Science [Turn over
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
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JSC 2013, Physical Science
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
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JSC 2013, Physical Science [Turn over
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
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JSC 2013, Physical Science
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
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JSC 2013, Physical Science [Turn over
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.
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JSC 2013, Physical Science
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]
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JSC 2013, Physical Science
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]
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JSC 2013, Physical Science
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]
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JSC 2013, Physical Science
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]
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JSC 2013, Physical Science
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]
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JSC 2013, Physical Science
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]
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JSC 2013, Physical Science
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]
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JSC 2013, Physical Science
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]
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JSC 2013, Physical Science
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
JSC 2013, Physical Science
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]
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JSC 2013, Physical Science
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
JSC 2013, Physical Science
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
JSC 2013, Physical Science
23
JSC 2013, Physical Science
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.
).