waec model questions vol1 2019 geography | Practical

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Question 1 View Details
A topographic map of the town of Ikot Ekpene is provided. The map scale is 1 cm : 250 m. The map includes a north arrow and a legend. The following features are shown: - A rectangular park (P) occupies 4 grid squares horizontally and 3 grid squares vertically; each grid square on the map measures 1 cm × 1 cm. - A river (R) runs from point A to point B in a straight line that measures 6.5 cm on the map. - A road (M) connects point C to point D and is shown to be 4.2 cm long on the map. - The bearing of line AB (river) measured clockwise from north is 135°. - The bearing of line CD (road) measured clockwise from north is 70°.
Question Parts
(a)
Calculate the actual length of the river in metres.
(b)
Determine the actual area of the park in hectares.
(c)
Find the angle between the direction of the river and the road (i.e., the smallest angle between their bearings). Express your answer to the nearest degree.
(d)
If a new map is drawn at a scale of 1 cm : 100 m, what will be the length of the river on the new map in centimetres? Round to one decimal place.
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Question 2 View Details
A surveyor is preparing two maps of the same area. Map A is drawn at a scale of 1 : 40 000 and Map B at a scale of 1 : 20 000. - On Map A, the distance between Town X and Town Y measured with a ruler is 9.6 cm. - On Map B, a rectangular plot of land is shown with a length of 5.4 cm and a width of 3.2 cm.
Question Parts
(a)
Determine the actual distance between Town X and Town Y in kilometres.
(b)
Calculate the real area of the rectangular plot in square metres.
(c)
If the surveyor wants to represent the same rectangular plot on Map A (scale 1 : 40 000), what will be its length and width on Map A in centimetres? Give answers to one decimal place.
(d)
The surveyor decides to use a reduced scale of 1 : 80 000 for a summary map. What will be the map distance between Town X and Town Y on this reduced map? Round to one decimal place.
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Question 3 View Details
A topographic map of a coastal region is drawn at a scale of 1 cm : 5 km. The map shows the following coordinates of two towns: - Town A: Latitude 6°30'N, Longitude 3°15'E - Town B: Latitude 6°45'N, Longitude 3°45'E The map is oriented such that true north is 30° clockwise from the upward direction of the sheet. Using a ruler and a protractor, answer the following:
Question Parts
(a)
Measure the straight‑line distance between Town A and Town B on the map and convert it to the actual ground distance in kilometres.
(b)
From the latitude values, indicate which town is likely to experience a higher mean annual temperature and explain why.
(c)
Determine the true bearing from Town A to Town B, taking the 30° clockwise rotation of the map into account.
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Question 4 View Details
Three weather stations (S1, S2 and S3) are situated on a straight line running east‑west across a region. Their coordinates and observed sea‑level pressures are given below: - S1: 5 km east of the western end, pressure = 1012 hPa - S2: 55 km east of the western end, pressure = 1008 hPa - S3: 105 km east of the western end, pressure = 1010 hPa Assume the stations are equally spaced in the east‑west direction (i.e., the distance between successive stations is 50 km). Using the data, answer the following: (a) Plot the pressure values on a simple sketch map (distance axis only) and label the points. (b) Identify the approximate position of the centre of the low‑pressure system. (c) State the direction of the pressure‑gradient force acting at station S2. (d) Estimate the geostrophic wind speed at S2 using the formula V = (1/ρf) × (Δp/Δd), where air density ρ = 1.2 kg·m⁻³, Coriolis parameter f = 1.0 × 10⁻⁴ s⁻¹, and Δp/Δd is the pressure change per unit distance between S1 and S3. (e) List two possible sources of error in the wind‑speed estimate obtained in part (d).
Question Parts
(a)
Draw a sketch showing the three stations on a horizontal axis and plot their respective pressure readings as points.
(b)
From the plotted points, indicate the approximate location of the centre of the low‑pressure system.
(c)
State the direction of the pressure‑gradient force (PGF) acting at station S2.
(d)
Calculate the geostrophic wind speed at S2 using the pressure difference between S1 and S3. Show all steps.
(e)
Mention two possible sources of error that could affect the wind‑speed estimate obtained in part (d).
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