neco model questions vol1 2019 geography | Practical

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Question 1 View Details
A topographic map of the study area is drawn with a scale of 1 cm : 5 km. The map shows the following settlements with their positions measured from the south‑west corner of the map (origin O) in centimetres: - Town A : (2.0 cm, 3.5 cm) - Town B : (8.0 cm, 9.0 cm) - Town C : (5.5 cm, 2.0 cm) A river runs north‑south and is represented on the map by the vertical line x = 6.0 cm. Answer the following questions:
Question Parts
(a)
Calculate the straight‑line distance on the ground between Town A and Town B.
(b)
Determine the bearing of the line from Town A to Town B (expressed as N θ° E, rounded to the nearest degree).
(c)
State whether Town C lies east or west of the river and give the shortest ground distance from Town C to the river.
(d)
If a field surveyor walks from Town A to Town B at a constant speed of 4 km h⁻¹, estimate the time required for the journey, rounding to the nearest minute.
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Question 2 View Details
A map of the coastal road from Town X to Town Y is drawn at a scale of 1 : 50 000 (1 cm on the map represents 0.5 km on the ground). The route is measured on the map and passes through three intermediate points P, Q and R. The measured lengths are: - X‑P : 3.2 cm - P‑Q : 4.5 cm - Q‑R : 2.8 cm - R‑Y : 5.0 cm Using the data above, answer the following:
Question Parts
(a)
Calculate the total actual distance of the route in kilometres.
(b)
If a vehicle travels the whole route at an average speed of 60 km h⁻¹, determine the total travel time in hours and minutes (rounded to the nearest minute).
(c)
A student mistakenly uses a scale of 1 : 25 000 (1 cm = 0.25 km) to compute the distance. Determine the percentage error in the distance obtained by the student relative to the correct distance.
(d)
Discuss two possible sources of error that could affect the accuracy of the distance measurement on the map and suggest one precaution for each source.
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Question 3 View Details
A topographic map of the Niger Delta region is drawn at a scale of 1 cm : 5 km. The map shows the coordinates of Town A as 4° 30' N, 7° 15' E and Town B as 4° 45' N, 7° 45' E.
Question Parts
(a)
Convert the coordinates of Town A and Town B from degrees‑minutes to decimal degrees (to two decimal places).
(b)
Using the map scale, determine the north‑south (vertical) and east‑west (horizontal) separations between the two towns in kilometres.
(c)
Using the average latitude of the two towns, calculate the straight‑line (great‑circle) distance between them. Show all steps and give the final answer to the nearest kilometre.
(d)
State one possible source of error that could affect the distance obtained in part (c).
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Question 4 View Details
During a week of observation, the following data were recorded at three synoptic stations situated along a north‑south line:
Question Parts
(a)
Calculate the pressure gradient between Station X (latitude 6° 00' N) and Station Z (latitude 7° 00' N). State its magnitude in hPa per kilometre and its direction (north‑south).
(b)
Assuming geostrophic balance and using the Coriolis parameter f = 1.0 × 10⁻⁴ s⁻¹ (appropriate for latitude ≈ 6.5° N), estimate the wind speed at the midpoint between Stations X and Z. Show your calculation and give the speed in km h⁻¹ (1 m s⁻¹ = 3.6 km h⁻¹).
(c)
Based on the pressure and temperature pattern shown in the table, identify the type of weather front that most likely passed over the area during the week and justify your answer.
(d)
Recommend two practical measures that local farmers could adopt to mitigate the adverse effects of the identified front.
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