neco 2023 geography | Practical

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Question 1 View Details
A topographic map of a small town is drawn with a scale of 1 cm : 250 m. The map is printed on a square grid where each grid square measures 1 cm by 1 cm. The legend on the map shows the following symbols: Δ – School ☐ – Market ▲ – Hospital ○ – Park The symbols are placed at the grid references shown below (the first number is the column, the second is the row): - School (Δ) : (2, 3) - Market (☐) : (7, 8) - Hospital (▲) : (9, 2) - Park (○) : (5, 5) Using the information above, answer the following:
Question Parts
(a)
State the type of feature represented by the symbol at grid reference (5,5).
(b)
Calculate the actual straight‑line distance between the school and the market. Give your answer in metres, rounded to the nearest metre.
(c)
Determine the three‑figure bearing from the school to the hospital. Express the bearing to the nearest degree.
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Question 2 View Details
A map of a farmer’s land is drawn at a scale of 1 : 5 000 (i.e., 1 cm on the map represents 50 m on the ground). On the map a rectangular field is shown. The dimensions measured with a ruler are: - Length = 6.4 cm (possible error ±0.2 cm) - Width = 3.2 cm (assumed exact) Using this information, answer the following:
Question Parts
(a)
Calculate the actual area of the field in hectares. Give your answer to two decimal places.
(b)
If the measured length could be 0.2 cm longer or shorter, determine the maximum possible percentage error in the computed area. Give your answer to two decimal places and state whether it is an over‑estimate or under‑estimate.
(c)
The farmer intends to fence the entire perimeter of the field. Using the scale, calculate the total length of fencing required in metres, rounded to the nearest metre.
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Question 3 View Details
A topographic map of Nigeria is provided with latitude and longitude grid lines drawn at 1° intervals. The map scale is 1 cm : 100 km. On the map the following two cities are marked: - City A is located at the intersection of the 6°30' N latitude line and the 3°20' E longitude line. - City B is located at the intersection of the 12°00' N latitude line and the 8°30' E longitude line. Using the map, answer the following questions:
Question Parts
(a)
State the latitude and longitude of City A and City B as read from the map.
(b)
Calculate the approximate straight‑line distance between City A and City B. Use the following approximations: each degree of latitude equals 111 km; each degree of longitude equals 111 km × cos (mean latitude). Show all steps.
(c)
Mention one possible source of error that could affect the distance you have obtained.
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Question 4 View Details
A weather station recorded the following observations at 09:00 h each day for a week. | Day | Temperature (°C) | Relative Humidity (%) | Wind Speed (km/h) | |-----|------------------|-----------------------|-------------------| | Mon | 28 | 85 | 12 | | Tue | 30 | 80 | 10 | | Wed | 32 | 70 | 8 | | Thu | 31 | 65 | 6 | | Fri | 29 | 75 | 7 | | Sat | 27 | 90 | 15 | | Sun | 26 | 95 | 20 | Using the data above, answer the following questions:
Question Parts
(a)
Calculate the average (mean) temperature for the week.
(b)
The heat index (HI) for each day can be approximated by the formula: HI = T + 0.33 × RH – 0.70 × WindSpeed – 4.00, where T is temperature (°C), RH is relative humidity (%), and WindSpeed is in km/h. Calculate the HI for each day and state which day had the highest heat index.
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