waec model questions vol1 2017 geography | Practical

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Question 1 View Details
A topographic map of the fictional district of Umuogwu is drawn with a scale of 1 cm : 0.5 km. The map uses a rectangular grid where each grid square measures 1 cm by 1 cm. The grid coordinates (in centimetres) of four towns are given in the table below: Town | X‑coordinate (cm) | Y‑coordinate (cm) -------|-------------------|------------------- A | 2 | 3 B | 8 | 3 C | 9 | 7 D | 3 | 8
Question Parts
(a)
Determine the straight‑line distance between Town A and Town C in kilometres (to two decimal places).
(b)
State the bearing of the line from Town A to Town C (to the nearest degree, measured clockwise from north).
(c)
Using the grid method, estimate the area of the quadrilateral ABCD in square kilometres (to two decimal places).
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Question 2 View Details
A river is represented on a map whose scale is 1 cm : 250 m (i.e., 1 cm = 0.25 km). The measured map distances between successive points along the river are given below: Segment | Measured length on map (cm) --------|------------------------------ P1‑P2 | 3.2 P2‑P3 | 4.5 P3‑P4 | 2.8 P4‑P5 | 5.0 The elevations at the first and last points are: P1 = 150 m, P5 = 30 m.
Question Parts
(a)
Calculate the actual length of the river from P1 to P5 in kilometres (to three decimal places).
(b)
Determine the average gradient of the river between P1 and P5 as a percentage (to one decimal place).
(c)
If a motorised boat travels at a constant speed of 5 km h⁻¹, estimate the time required to travel from P1 to P5 in minutes (to the nearest minute).
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Question 3 View Details
A field survey was carried out to determine the straight‑line distance between Village X and Village Y. The GPS readings recorded the following geographic coordinates: - Village X: Latitude 5°30' N, Longitude 7°45' E - Village Y: Latitude 5°45' N, Longitude 8°10' E Assume the Earth is a sphere of radius 6371 km and use the following approximations for small distances: - 1° latitude = 111 km - 1° longitude = 111 km × cos(mean latitude) Answer the following questions:
Question Parts
(a)
Calculate the north‑south distance between the two villages in kilometres.
(b)
Calculate the east‑west distance between the two villages in kilometres (use the mean latitude of the two villages).
(c)
Using the results of (a) and (b), determine the straight‑line distance between the villages (treat the north‑south and east‑west components as perpendicular).
(d)
If a motorbike travels at an average speed of 40 km/h along the straight line, estimate the travel time in hours and minutes. Discuss two possible sources of error that could affect the distance obtained from the GPS readings.
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Question 4 View Details
A weather station recorded the monthly maximum temperature (°C) and total rainfall (mm) for a 12‑month period as shown in the table. | Month | Max Temp (°C) | Rainfall (mm) | |-------|---------------|---------------| | Jan | 32 | 120 | | Feb | 33 | 80 | | Mar | 34 | 60 | | Apr | 33 | 20 | | May | 31 | 10 | | Jun | 28 | 5 | | Jul | 27 | 2 | | Aug | 27 | 4 | | Sep | 28 | 15 | | Oct | 30 | 40 | | Nov | 31 | 90 | | Dec | 32 | 130 | Using this data, answer the following questions:
Question Parts
(a)
Calculate the mean annual maximum temperature and the mean annual rainfall.
(b)
Identify the month with the highest maximum temperature and the month with the highest rainfall. State the values.
(c)
Determine (i) the range of monthly maximum temperatures and (ii) the coefficient of variation (CV) for monthly rainfall. Use the sample standard deviation formula and give the CV to one decimal place.
(d)
Based on the temperature and rainfall pattern, classify the climate of the location using the Köppen system (choose among Aw, Am, Af, Cw, etc.) and justify your choice with reference to the data.
(e)
Suggest two practical implications of this climate for agricultural planning in the area.
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