Gr 9 Nov 2016 NS MEMORANDUM Uploaded by: CJ Botha File type

GRADE 9
NATURAL SCIENCES
NOVEMBER 2016
MARKS: 100
MEMORANDUM
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Natural Sciences
Grade 9
2
Memorandum
FS/November 2016
SECTION A
QUESTION 1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
B
C
A
B
C
D
C
C
A
B
[10]
QUESTION 2
2.1
2.2
2.3
2.4
2.5
G
H
A
C
F
[5]
QUESTION 3
3.1
3.2
3.3
3.4
3.5
Magma
Ozone layer
Lithosphere
Metamorphic
Ore
[5]
TOTAL SECTION A: 20
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Grade 9
3
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FS/November 2016
SECTION B
QUESTION 4
4.1
●



4.2
●


4.3
The forces are equal in size. 
The forces act in opposite directions. 
The forces are contact forces. 
The forces act simultaneously on John and Paul. 
(Any three)
Can change direction. 
Motion/movement
Rotation
(3)
4.3.1 ATTRACTIVE. Opposite poles attract each other.
4.3.2 ●
●
(3)
They both have North and South poles or
They are surrounded by magnetic poles 
(2)
(Any one)
(1)
[9]
QUESTION 5
5.1
5.2
5.1.1 When the balloon is rubbed against the shirt, electrons flow from the
shirt to the balloon.  The balloon now has an excess of electrons
and is negatively charged
(2)
5.1.2 Yes, positive. 
(2)
5.1.3 When the balloon approaches the ceiling, negative charges in the
surface of the ceiling are repelled.  The surface of the ceiling
facing the balloon becomes positively charged and attracts the
balloon. 
(2)
5.2.1 ●

Independent variable: number of cell 
Dependent variable: voltage 
(2)
5.2.2 Voltage increases with increase in number of cells. 
OR
Increase in number of cells increases voltage. 
5.2.3 6 V 
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(2)
(1)
[11]
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Natural Sciences
Grade 9
4
Memorandum
FS/November 2016
QUESTION 6
6.1
6.1.1 B
6.1.2 ●

6.2
(1)
It has less total resistance. OR
Each set of bulbs receives the energy as the source energy
and it is divided between the two bulbs. 
(1)
6.1.3 Circuit A: No bulb will glow 
Circuit B: Two bulbs in the unaffected branch will glow 
(2)
6.1.4 The lights of Christmas tree should be connected in parallel. 
(1)
Cost of energy consumption = kW × h × cost
= (2 × 1,5 × 67)  + (1,5 × 1 × 67)  +(0,4 × 10 × 67)  + (0,2 × 10 × 67) 
= 201 + 100,5 + 268 + 134
= 703,5c
= R7,04
(6)
[11]
QUESTION 7
7.1
7.1.1 (a)
(b)
A fuse is a small piece of metal that is situated in a central
location in, for example a socket. 
The piece of metal will melt if there is an overload and the
circuit is interrupted. 
(2)
It is cheap. 
It is easily available. 
(1)
(Any one)
It has to be replaced. 
(1)
A circuit breaker is a switch. 
As soon as there is a problem, the switch will turn off and
the circuit is interrupted. 
(2)
(b)
It can just be turned on again. 
(1)
(c)
It is expensive. 
(1)
(c)
7.1.2 (a)
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7.2
7.2.1 (a)
(b)
7.2.2 ●

5
Memorandum
FS/November 2016


Small nuclear contamination if managed responsibly. 
Efficient electricity supply. 
Safe if the safety measures are followed. 
(Any two)
(2)
●
●
Free, renewable resource. 
It is clean, no pollution or waste products. 
(2)
●
Infrastructure (dams) are expensive to build. 
There are environmental impacts, for example, flooding of
surrounding areas.
(Any one)
(1)
[13]
QUESTION 8
8.1
8.2
X – The core 
Y – The crust 
Z – The mantle 
●



(3)
Lithosphere: The outer rockiest part of the Earth (or hard part of the
Earth with soil and rocks) 
Atmosphere: The layer of air around the Earth 
Hydrosphere: The water bodies of the Earth (oceans, rivers,
dam, etc) 
Biosphere: The part of the Earth where life exists (where animals
and plants exist) 
(8)
[11]
QUESTION 9
9.1
9.2
9.1.1 The rock cycle is a natural continuous process that forms rocks over
a long period of time, breaks it down and forms it again. 
(2)
9.1.2 Lava
(1)
9.1.3 Igneous rock
(1)
9.1.4 Volcanic rock/Igneous rock
(1)
9.1.5 Granite/Basalt
(1)
9.1.6 Some of the rock becomes magma again OR Magma pushes up
to the surface of the earth. 
(1)
Ore is rocks that contain high concentration of precious minerals like
gemstones and metals. 
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(2)
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Natural Sciences
Grade 9
6
Memorandum
FS/November 2016
QUESTION 10
10.1 A
Thermosphere 
B
Mesosphere 
C
Stratosphere 
D
Troposphere 
(4)
10.2
It is the increase in the average temperature of the earth’s atmosphere and
oceans.
(2)
10.3
●



Climate change
Rising sea level
Food shortage
Mass extinction
(Any one)
(1)
10.4
Effect on
environment
Pollution
Water sources
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Open cast mine
Deep-level mines
Causes large holes in the
Causes unsightly mine
ground
dumps
Destroy habitats
Destroy habitats
(Any one)
(Any one)
Dust pollution
Noise pollution
Air pollution (Any one)
Acid water can end up in
rivers or groundwater
Noise pollution
Air pollution
(Any one)
Waste products can end
up in rivers. 
Contaminated water can
seep into water sources. 
(Any one)
(6)
[13]
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Natural Sciences
Grade 9
7
Memorandum
FS/November 2016
QUESTION 11
11
11.1
●





11.2 A
B
C
D
E
Tzaneen 
Broederstroom 
Mapunguwe 
Archaeological sites in Kwa Zulu-Natal 
Thulamela in the Kruger National Park 
Phalaborwa 
(Stellar) Nebula
Main sequence star/Yellow star
Red giant
Planetary nebula
White dwarf
(Any two)
(2)
(5)
[7]
TOTAL SECTION B: 80
GRAND TOTAL: 100
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