1.1 Refer to FIGURE 1.1 showing a synoptic weather map of southern Africa - NSC Geography - Question 1 - 2017 - Paper 1
Question 1
1.1 Refer to FIGURE 1.1 showing a synoptic weather map of southern Africa. Choose the correct word(s) from those given in brackets. Write only the word(s) next to th... show full transcript
Worked Solution & Example Answer:1.1 Refer to FIGURE 1.1 showing a synoptic weather map of southern Africa - NSC Geography - Question 1 - 2017 - Paper 1
Step 1
1.1.1 The synoptic weather map data was captured at (12:00/14:00).
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Answer
The synoptic weather map data was captured at 14:00.
Step 2
1.1.2 The season represented by this synoptic weather map is (summer/winter).
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Answer
The season represented by this synoptic weather map is summer.
Step 3
1.1.3 Area A on the synoptic weather map is a (ridge/trough).
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Area A on the synoptic weather map is a trough.
Step 4
1.1.4 The weather system associated with the area at A creates (stable/unstable) weather conditions.
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The weather system associated with area A creates unstable weather conditions.
Step 5
1.1.5 The wind at weather station B is a (NNE/SSW) wind.
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The wind at weather station B is a NNE wind.
Step 6
1.1.6 The speed of weather station B is (20/10) knots.
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The speed of weather station B is 20 knots.
Step 7
1.1.7 The air pressure at the centre of the South Atlantic anticyclone is (lower/higher) than 1032 hPa.
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The air pressure at the centre of the South Atlantic anticyclone is higher than 1032 hPa.
Step 8
1.2 Choose a term from COLUMN B that matches the complementary term in COLUMN A.
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Terms matched should reflect the correct relationships as per the given columns.
Step 9
1.3.1 Name fronts A and B.
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Front A is a Cold front and Front B is a Warm front.
Step 10
1.3.2 In what stage of development is this mid-latitude cyclone?
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This mid-latitude cyclone is in the Mature/Warm Sector stage.
Step 11
1.3.3 Give evidence in the diagram to prove that this mid-latitude cyclone occurs in the Northern hemisphere.
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Evidence includes the rotation of air masses and the presence of the warm sector to the south of the cold front.
Step 12
1.3.4 Give a reason why front B is associated with a greater rainfall extent than front A.
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Front B is associated with a greater rainfall extent due to more extensive cloud coverage and a slower movement.
Step 13
1.3.5 Describe the likely weather conditions associated with the cloud type at front A.
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The likely weather conditions at front A include thunderstorms and heavy rainfall due to cumulonimbus clouds.
Step 14
1.3.6 Discuss TWO expected weather changes that could occur when the mid-latitude cyclone reaches the occlusion stage.
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Expect a drop in temperatures and an increase in wind speeds as the system occludes.
Step 15
1.4.1 Complete the statement describing an urban heat island in A:
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An urban heat island describes the phenomenon where urban areas become significantly warmer than their rural surroundings.
Step 16
1.4.2 Refer to B and give TWO reasons for the heat generated in the city.
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Reasons include the concentration of buildings absorbing sunlight and human activities increasing heat emissions.
Step 17
1.4.3 What impact will the increased temperatures have on people living in the city?
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Increased temperatures can lead to health risks, particularly for vulnerable populations, as well as increased energy demand for cooling.
Step 18
1.4.4 In a paragraph of approximately EIGHT lines, provide sustainable methods that can be implemented in an attempt to control the temperature in the city.
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Sustainable methods include increasing green spaces, using reflective materials in urban design, encouraging public transport, and implementing efficient energy usage in buildings.
Step 19
1.5.1 Name the type of river in the photograph.
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The type of river in the photograph is an intermittent river.
Step 20
1.5.2 Provide evidence from the photograph to support your answer to QUESTION 1.5.1.
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Evidence includes visible seasonal changes in water levels depicted in the photograph.
Step 21
1.5.3 Define the term water table.
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The water table is the upper layer of underground water where the soil or rock is saturated with water.
Step 22
1.5.4 Draw TWO labelled diagrams to show the different positions of the water table in the dry season and the rainy season.
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Labelled diagrams should illustrate the fluctuating water table levels between the dry and rainy seasons.
Step 23
1.5.5 In a paragraph of approximately EIGHT lines, explain the influence of precipitation and gradient on the amount of deposited material evident on the river bed.
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Precipitation influences the river's flow speed which, combined with the gradient, affects the capacity to carry sediments. Higher gradients usually lead to faster flows and significant erosion upstream, while gentler gradients contribute to sediment deposition downstream.
Step 24
1.6.1 Identify the types of river flow A and B.
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River flow A is Turbulent whereas river flow B is Laminar.
Step 25
1.6.2 In which course of the river would you expect to find river flow B?
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River flow B is typically found in the middle/lower course of the river.
Step 26
1.6.3 Give a reason for river flow A in the photograph.
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River flow A can be attributed to the steep gradient and the presence of obstacles in the riverbed.
Step 27
1.6.4 Explain the difference in the colour of the water associated with river flow A and B in the photographs.
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River flow A appears clearer due to turbulent water not carrying as much sediment, while river flow B appears darker due to suspended particles.
Step 28
1.6.5 Give a reason for river flow A in the photograph.
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Turbulent flow A is characterized by rapid water movement and mixing, resulting in a clearer appearance.
Step 29
1.6.6 White water rafting.
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White water rafting is a recreational activity involving navigating through white water rapids, typically characterized by strong currents and frothy water.
