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WAEC Geography 2021 Papers

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Question : 6

Total: 50

The temperature reading at the peak of a volcano is 6ºC. What will be the temperature at the foot of the volcano which is 3000 metres from the surrounding low land?

5.5ºC
13.5ºC
13.5ºC
25.5ºC

Solution:

Concept:

Temperature increases as altitude decreases, at an average lapse rate of

6.5^\circ\text{C}

per

1000

metres.

Explanation:

The volcano foot is

3000

metres below the peak, so the temperature will rise while descending.

Temperature increase

= 6.5 \times 3 = 19.5^\circ\text{C}

.

Temperature at the foot

= 6^\circ\text{C} + 19.5^\circ\text{C} = 25.5^\circ\text{C}

.

Answer:

25.5^\circ\text{C}

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