3.1 MAP SKILLS AND CALCULATIONS
3.1.1 The index contour line in block A1 on the orthophoto map is .. - English General - NSC Geography - Question 3 - 2024 - Paper 1
Question 3
3.1 MAP SKILLS AND CALCULATIONS
3.1.1 The index contour line in block A1 on the orthophoto map is ... meters.
A 1822
B 1835
C 1840
D 1842
3.1.2 The grid references... show full transcript
Worked Solution & Example Answer:3.1 MAP SKILLS AND CALCULATIONS
3.1.1 The index contour line in block A1 on the orthophoto map is .. - English General - NSC Geography - Question 3 - 2024 - Paper 1
Step 1
3.1.1 The index contour line in block A1 on the orthophoto map is ... meters.
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Answer
The index contour line in block A1 on the orthophoto map is 1840 meters.
Step 2
3.1.2 The grid references for spot height 1872 in block B1 on the topographical map is ...
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Answer
The grid reference for spot height 1872 in block B1 on the topographical map is B 28°30'32" S; 28°17'15" E.
Step 3
3.1.3 (a) Determine the vertical interval (VI) of the illustrated gradient.
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Answer
The vertical interval (VI) of the illustrated gradient can be calculated as follows:
VI=SpotHeighthigher−SpotHeightlower
With the values obtained from the map, VI is determined to be 42 meters.
Step 4
3.1.3 (b) Is the illustrated average gradient between 6 and 7 on the orthophoto map gentle or steep?
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The illustrated average gradient between 6 and 7 on the orthophoto map is gentle.
Step 5
3.1.3 (c) State how the illustrated average gradient influenced the human activities between 6 and 7 on the orthophoto map.
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The gentle average gradient allows for easier cultivation and farming activities in the area, as it facilitates appropriate drainage and accessibility.
Step 6
3.1.4 (a) Determine the true bearing (TB) from spot height 1802 to trigonometric station 1820.
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The true bearing (TB) from spot height 1802 to trigonometric station 1820 is 222°24'.
Step 7
3.1.4 (b) Calculate the magnetic declination (MD) for 2024.
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The magnetic declination (MD) for 2024 is 4° westwards.
Step 8
3.1.4 (c) Determine the bearing magnetic (MB) from spot height 1802 to trigonometric station 1820.
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Answer
The bearing magnetic (MB) is calculated as follows:
MB=TB+MD
Substituting the values:
MB=222°24′+4°=226°24′
Step 9
3.2.1 What is the most likely reason for the difference in average temperature between spot height 2011 in block A2 and trigonometric station 181 in block E3?
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The most likely reason for the difference in average temperature is due to differences in A: Altitude.
Step 10
3.2.2 The rainfall in the mapped area is seasonal. Give evidence from block E5 on the topographical map to support this statement.
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Evidence supporting the statement that rainfall is seasonal can be found in Block E5, where non-perennial rivers are indicated, showing that water flow is dependent on seasonal rainfall.
Step 11
3.2.3 At what time (morning or afternoon) was the photograph taken?
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The photograph was taken in the morning.
Step 12
3.2.4 Give a reason for your answer to QUESTION 3.2.3.
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The shadows in the photograph fall to the west, indicating that the sun is rising in the east, characteristic of morning light.
Step 13
3.2.5 State the purpose of the row of trees in blocks A5 and B5.
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The purpose of the row of trees is to serve as a windbreak, which helps in reducing soil erosion.
Step 14
3.2.6 The spring in block B4 on the orthophoto map is ... and is known as a ...
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The spring in block B4 on the orthophoto map is a C: stream.
Step 15
3.2.7 In which direction does stream F in block A2 flow?
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Stream F in block A2 flows south-westerly.
Step 16
3.3.1 The dam at H in block B3 on the topographical map is a ... feature and is considered to be ... water.
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The dam at H in block B3 is a feature categorized as A: polygon and is considered to be non-perennial water.
Step 17
3.3.2 Identify the remote sensing device in the sketch.
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The remote sensing device in the sketch is a satellite.
Step 18
3.3.3 Is the resolution of the orthophoto map high or low?
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The resolution of the orthophoto map is high.
Step 19
3.3.4 Give a reason for your answer to QUESTION 3.3.3.
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The high resolution is evident as features can be clearly seen, allowing for detailed analysis of the mapping area.
Step 20
3.3.5 The cost of developing infrastructure in blocks C4 and C5 will be ... (more/less) expensive.
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The cost of developing infrastructure in blocks C4 and C5 will be more expensive due to the rugged terrain and access limitations.
