Fill in the blanks :

(a) The liquid in the earth’s core has a temperature of about ……………. .

(b) …………., ….……., ……….., are factors necessary for the existence of living things.

(c) The ……………. rays of the sun are absorbed in the atmosphere.

(d) ………………. % of the earth’s surface consists of water.

(e) We get useful substances like ……………., ……………., from sea water.

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Solution

(a) The liquid in the earth’s core has a temperature of about 4,000°C.

(b) Atmosphere, hydrosphere, lithosphere, are factors necessary for the existence of living things.

(c) The harmful rays of the sun are absorbed in the atmosphere.

(d) 71 % of the earth’s surface consists of water.

(e) We get useful substances like petrol, diesel from sea water.

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