waec model questions vol1 2024 geography | Practical

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Question 1 View Details
A topographic map of the River Zeta basin is drawn at a scale of 1 : 25 000. The contour interval is 10 m. The river is traced on the map from its source (point A) to its mouth (point D) and is approximated by four straight segments as follows: - Segment AB: 3.2 cm, elevation at A = 120 m - Segment BC: 2.5 cm, elevation at C = 100 m - Segment CD: 4.0 cm, elevation at D = 80 m Using the information provided, answer the following:
Question Parts
(a)
Calculate the actual length of the river from A to D in kilometres.
(b)
Determine the average gradient of the river expressed as a percentage (drop in elevation per 100 m of horizontal distance).
(c)
List two possible sources of error that could affect the accuracy of the gradient you have calculated.
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Question 2 View Details
A regional map of the town of Ijebu is drawn at a scale of 1 : 25 000. An inset map of the same area is reproduced at a reduced scale of 1 : 50 000. On the main map the straight‑line distance between the market square (M) and the railway station (R) measures 6.0 cm. On the inset the same distance measures 2.4 cm.
Question Parts
(a)
Confirm that the inset map is indeed a reduction of the main map by calculating the reduction factor.
(b)
Calculate the actual ground distance between M and R in kilometres.
(c)
If a new map of the same area is to be produced at a scale of 1 : 10 000, what length in centimetres should be marked on the new map for the distance between M and R?
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Question 3 View Details
A topographic map of a region is drawn at a scale of 1 : 250 000. The map shows the following latitude and longitude of two towns: Town A: 5° 30' N, 7° 15' E Town B: 5° 45' N, 7° 45' E Using the data provided, answer the following:
Question Parts
(a)
Convert the latitude and longitude of each town from degrees‑minutes to decimal degrees.
(b)
Determine the north‑south (Δlat) and east‑west (Δlong) separations in kilometres. Use 1° latitude = 111 km and 1° longitude = 111 km × cos(mean latitude). Show all steps.
(c)
Using the north‑south and east‑west separations, calculate the straight‑line distance between Town A and Town B (assume a right‑angled triangle).
(d)
What is the distance between the two towns on the map in centimetres? (Recall that at the given scale, 1 cm on the map represents 2.5 km on the ground.)
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Question 4 View Details
The following observations were recorded at a weather station over three consecutive days: | Day | Temperature (°C) | Atmospheric Pressure (hPa) | Wind Direction | Wind Speed (km/h) | Relative Humidity (%) | |-----|------------------|----------------------------|----------------|-------------------|-----------------------| | 1 | 28 | 1012 | NNE | 12 | 68 | | 2 | 24 | 1005 | ENE | 20 | 75 | | 3 | 20 | 1000 | ESE | 28 | 82 | Using the data above, answer the questions that follow:
Question Parts
(a)
Calculate the average temperature for the three‑day period.
(b)
Determine the pressure trend over the period and compute the average rate of pressure change per day (in hPa per day). State whether the trend is rising, falling or steady.
(c)
Based on the changes in temperature, pressure and wind direction, identify the type of weather front that most likely passed the station during the three days. Provide a brief justification (2‑3 sentences).
(d)
Suggest two practical precautions that farmers in the area should adopt in response to the observed weather pattern.
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