CLIMATE AND WEATHER QUESTIONS AND ANSWERS GRADE 12

1. Temperate cyclone
2. Tropical storm
3. Typhoon
4. Tropical cyclone
   (Correct answer is underlined)

2. Short answer questions
Example:
List two characteristics of a tropical cyclone.
Answer:

1. Accompanied by thunderstorms
2. Eye in the centre
3. Draw a cross-section from A to B

For example, see Figures 1.2.2A and 1.2.3B.

1. 1. South Atlantic high pressure
   2. South Indian high pressure (4)
2. A tropical cyclone can be seen on the map.
   Mid-latitude cyclones are seen south of South Africa.
   The South Indian and South Atlantic high pressures are south of South Africa.
   A low pressure cell can be seen over the centre of South Africa.
   The date: 30/01/201033 (any 2) (4)
3. Coastal low pressure (2)
4. 1. F – Cold front; H – Warm front (4)
   2. In an easterly direction/from west to east (2)
   3. Temperatures will decrease; pressure will increase;
      Cumulonimbus clouds and thunderstorms will occur (6)
5. 1. Tropical cyclone (2)
   2. Three (2)
   3. Westerly/from east to west (2)
   4. Temperature must be above 27°C; Humidity must be high; There must only be light and variable wind;
      The atmosphere must be unstable; There must be a wide area of low pressure with closed isobars; It must be between 5°S and 25°S (needs Coriolis force);
      Little surface friction (any 2) (4)
6. Cloud cover: Clear skies; Wind speed: 10 knots;
   Wind direction: SSE; Air temperature: 22°C;
   Dewpoint temperature: 15 °C (8)
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1. 1. Anabatic wind/upslope wind
   2. Katabatic wind/downslope wind/gravity wind(4)
2. It can carry pollution out of the valley. (2)
3. Inversion layer/thermal belt (2)
4. 1. Winds bring cold air into the valley.
      These winds cause a frost pocket to form.
      The frost can kill the crops. (4)
   2. Cold conditions make working conditions in the industry difficult.
      Pollution produced by the industry will be trapped in the valley. (4)
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