Fill in the blanks. [3 marks]

(a) The layer of ozone gas absorbs _____ rays that come from the sun to the earth.

(b) Of the total water available on the earth, fresh water forms _ percent.

(c) Both _ and _____ constituents are present in the soil.

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Solution

(a) UV [1 mark]

(b) 3 [1 mark]

(c) biotic [0.5 mark]
abiotic [0.5 mark]

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Similar questions

Q. Fill in the blanks.
(a) The layer of ozone gas absorbs ………… rays that come from the sun to the earth.
(b) Of the total water available on the earth, fresh water forms ...... percent.
(c) Both ...…. and ……... constituents are present in the soil.

Q. Fill in the following blanks with suitable words:
(a) A convex lens .................. rays of light, whereas a concave lens .................. rays of light.
(b) Lenses refract light to form images: a..................... lens can form both real and virtual images, but a diverging lens forms only ...................... images.

Q. Replace the following with a word or a phrase.
(a) air in motion
(b) the liquid used to test for carbon dioxide
(c) the layer of air surrounding the earth
(d) increase in the temperature of the earth's atmosphere
(e) harmful rays from the sun
(f) the amount of water vapour present in the air
(g) a poisonous gas given out from the exhaust pipes of cars.
(h) addition of harmful substances to the atmosphere

Fill in the blanks.

(a) The density of water is ………… g/cc.

(b) A substance that dissolves in a liquid is called a ………… .

Answer the following:
a) Liquefied petroleum gas is used in kitchens. When the gas is in a cylinder, it is in the liquid state. When it comes out of the cylinder it becomes a gas (change A), then it burns (change B). Identify the processes A and B.

b) How does the ozone layer in the atmosphere protect us from harmful ultraviolet rays?
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Fill in the blanks. [3 marks] (a) The layer of ozone gas absorbs _________ rays that come from the sun to the earth. (b) Of the total water available on the earth, fresh water forms _________ percent. (c) Both _________ and _________ constituents are present in the soil.

(a) UV [1 mark] (b) 3 [1 mark] (c) biotic [0.5 mark] abiotic [0.5 mark]

Fill in the blanks. [3 marks]

(a) The layer of ozone gas absorbs _____ rays that come from the sun to the earth.

(b) Of the total water available on the earth, fresh water forms _ percent.

(c) Both _ and _____ constituents are present in the soil.

(a) UV [1 mark]

(b) 3 [1 mark]

(c) biotic [0.5 mark]
abiotic [0.5 mark]