Theory question 206
Weather(a) Name the instruments used in measuring the following: (i) Rainfall; (ii) Humidity (iii) Temperature (iv) Wind. (b) With the aid of a diagram, describe the instrument used to measure rainfall. (c) Explain how the instrument described in 6(b) above is used.
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(a)(i) Rain gauge. (ii) Hygrometer (wet and dry bulb thermometers). (iii) Thermometer / Six's maximum and minimum thermometer. (iv) Wind vane (direction) and anemometer (speed).
(b) Diagram: cylindrical metal case partly sunk in the ground; funnel at the top; inner collecting jar/bottle; graduated measuring cylinder.
(c) Place it in an open space away from trees and buildings, with the rim about 30 cm above the ground to avoid splashing; rain enters the funnel and collects in the jar; every day at a fixed time the water is poured into the measuring cylinder and read in mm; daily totals are added for the month and the year.
Label all the parts of the rain gauge.