GEOGRAPHY P1 2018 MARKING GUIDELINES

SENIOR CERTIFICATE EXAMINATIONS

GEOGRAPHY P1 2018

MARKING GUIDELINES

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Geography/P1

2 SC (Marking Guideline)

DBE/2018

SECTION A: CLIMATE, WEATHER AND GEOMORPHOLOGY

QUESTION 1

1.1 1.1.1 Polar front (1)

1.1.2 Wave/Formative stage (1)

1.1.3 1 000 hPa/mb (1)

1.1.4 Z (1)

1.1.5 Occlusion/Occluded stage (1)

1.1.6

Clockwise rotation of air (1) Subcontinent of southern Africa is visible on the map (1) Warm sector facing northwards (1) Cold sector facing southwards (1) 60?S line of latitude shown (1) [ANY ONE]

1.1.7 Family of cyclones/Cyclone families/Family of depressions (1)

(7 x 1) (7)

1.2 1.2.1 permanent (1)

1.2.2 periodic (1)

1.2.3 episodic (1)

1.2.4 periodic (1)

1.2.5 permanent (1)

1.2.6 episodic (1)

1.2.7 exotic (1)

1.2.8 periodic (1)

(8 x 1) (8)

1.3 1.3.1 A (1)

(1 x 1) (1)

1.3.2

The inversion layer is well below the plateau/escarpment (1) Presence of a high pressure over the plateau (1) Strong subsidence of air which indicates cold conditions (1) Moist air from the ocean is being prevented from moving inland (1) [ANY ONE]

(1 x 1) (1)

1.3.3 A stronger subsiding cold air mass (from the Kalahari HP) descends onto a

weaker (warm) air mass creating an inversion layer (2)

(1 x 2) (2)

1.3.4

There are stronger convection currents reducing the subsidence of cooler air (2)

It is higher than the plateau during summer months because the interior

experiences higher temperatures (2)

Weak descending cold air mass thus not pushed very far down (2)

Kalahari High Pressure Cell not well developed in summer (2)

[ANY TWO]

(2 x 2) (4)

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3 SC (Marking Guideline)

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1.3.5

Summer Additional warm moist air is drawn in from the coastal area (2) Rising moist air results in unstable conditions (2) Rising moist air results in cloud formation over the interior (2) Rising moist air results in more rainfall occurring over the interior (2) Drop in pressure over land as warm air rises (2) Moisture front develops over interior (2) Line thunderstorms develop over eastern interior (2) Winter Warm moist air blocked off from reaching the interior (2) Lack of rising moist air results in stable conditions (2) Lack of rising moist air reduces cloud cover over the interior (2) Lack of rising warm air results in no/little rainfall over the interior (2) Fewer clouds may result in the development of frost (2) Increase in pressure as interior is dominated by subsiding air (2) Large temperature range as a result of low temperatures at night and higher temperatures during the day (2) [ANY FOUR ? must refer to both summer and winter conditions] (4 x 2) (8)

1.4 1.4.1 Located on the valley floor/in a valley (1)

(1 x 1) (1)

1.4.2

Pollution is concentrated (1) Pollutants are trapped (1) Cannot easily be dispersed (1) [ANY ONE]

(2 x 1) (2)

1.4.3 (a) Anabatic/upslope wind (1)

(1 x 1) (1)

(b) Air rises along slopes/Air moves upslope (2) Air is lighter and warmer (2) [ANY ONE]

(1 x 2) (2)

(c)

Must indicate correct direction of movement by arrow (2) and any ONE

descriptive label.

(2 x 2) (4)

1.4.4

Poor visibility (2)

Increased traffic congestion (2)

Increased motor vehicles accidents (2)

Motor vehicles have a greater risk of hitting pedestrians/cyclists/animals (2)

[ANY TWO]

(2 x 2) (4)

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4 SC (Marking Guideline)

DBE/2018

1.5 1.5.1 A ? trellis (1) B ? rectangular (1)

(2 x 1) (2)

1.5.2 A ? folded sedimentary rocks/alternating hard and soft rock layers (1)

B ? rocks with joints/cracks/faulted rocks (1)

(2 x 1) (2)

1.5.3 (a) Both have tributaries that join the main stream at a 90? angle (2) (1 x 2) (2)

(b) In A the main streams follow more or less a straight path and in B the main

stream follows an irregular path (90? angles) (2)

A has more than one drainage basin while B has only one drainage basin

evident (2)

Tributaries in A shorter than in B (2)

[ANY ONE]

(1 x 2) (2)

1.5.4 Short, steep slopes (of anticlines) cause short tributaries and the main river is

longer because it flows along the length of the valley (2)

(1 x 2) (2)

1.5.5

The river flows along the joints and cracks within the rocks (2)

It is easier for the river to erode along existing fault lines rather than cutting a new

path (2)

(2 x 2) (4)

1.6 1.6.1 A fan shaped fluvial landform that is formed by deposited material where a river

enters the sea/at the mouth of the river (1)

[CONCEPT]

(1 x 1) (1)

1.6.2

Sand deposits can be seen (1) The fan shape (1) Distributaries/River splits into smaller streams near mouth (1) [ANY TWO]

(2 x 1) (2)

1.6.3 Distributaries (1)

(1 x 1) (1)

1.6.4 River splits up into smaller rivulets as it moves into a gentle gradient, in order to

move around sand deposits that block its path.

(1 x 2) (2)

1.6.5

If the sea bed next to the coastline is too steep/deep, the deposits will be washed

away (2)

Some coastlines have a big tidal range which do not allow material to accumulate

(2)

Some coastlines have strong ocean currents which do not allow material to

accumulate/easily remove material (2)

[ANY ONE]

(1 x 2) (2)

1.6.6

Regular deposition of silt makes soils, fertile, which is useful for farming (2)

Access to water makes it suitable for farming (2)

Water is available for fishing or aquaculture/fish farming (2)

Deltas extend the coastline and make more land available for farming (2)

Suitable for crop/rice farming because crop/rice needs a lot of water to grow (2)

The land is fairly flat - suitable for machinery (2)

Flat land ideal to construct transport routes for distributing produce (2)

[ANY FOUR]

(4 x 2) (8)

[75]

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5 SC (Marking Guideline)

DBE/2018

QUESTION 2

2.1 2.1.1 A/low (1)

2.1.2 B/high (1)

2.1.3 B/high (1)

2.1.4 A/low (1)

2.1.5 A/low (1)

2.1.6 B/high (1)

2.1.7 B/high (1)

2.1.8 A/low (1)

(8 x 1) (8)

2.2 2.2.1 F/Surface run-off (1)

2.2.2 E/Groundwater (1)

2.2.3 H/Confluence (1)

2.2.4 G/Drainage Density (1)

2.2.5 B/First Order Streams (1)

2.2.6 D/Laminar Flow (1)

2.2.7 A/Longitudinal Profile (1)

(7 x 1) (7)

2.3 2.3.1 East coast (1)

(1 x 1) (1)

2.3.2

High sea surface temperatures of 26,5 ?C or more (1)

High evaporation rate (1)

Condensation releases latent heat (1)

Unstable atmospheric conditions (1)

Calm conditions for the vortex to form (1)

Upper air divergence to maintain a low pressure on the surface (1)

Between latitudes 5? to 25? S (1)

Coriolis force is present (1)

[ANY TWO]

(2 x 1) (2)

2.3.3

Strong winds (2) Torrential/heavy rainfall (2) Storm surges (2) Rough/stormy seas (2) Damage to infrastructure/property (2) Outbreak of diseases (2) Possible loss of life (2) Destruction of crops (2) Drowning of livestock (2) Prepare for evacuations (2) Preparation of emergency teams (2) Flooding (2) [ANY TWO]

(2 x 2) (4)

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