Question

Write one word for each of the following.
(a) Substances that contaminate the air
(b) The instrument used to record seismic waves
(c) The uppermost layer of the earth
(d) The solid residue left behind after dry distillation of coal
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Answer 1

Answer:

a) Pollutants

b) Seismograph

c) Crust

d) Coke

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Answer 2

Answer:

(a) Pollutants

(b) Seismograph

(c) Crust

(d) Coke

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