1) The mixture of gases is called a) gravity b) Atmosphere c) Length 2) The atmosphere is attracted to the earth by the effect of................... a) Gravity b) Mass c) Volume 3) The Atmosphere consists of.............................. a) Oxygen and carbon dioxide b) Nitrogen , Oxygen , carbon dioxide and other gases c) Nitrogen and oxygen 4) From the importance of Atmosphere is a) Adjust the earth temperature b) Decrease earth temperature c) Protect the earth from harmful rays 5) A layer of the atmosphere protect the earth from harmful ray called.......................................... a) Ozone layer b) Atmosphere c) Gravity 6) The percentage of nitrogen gas in the atmosphere is.......................... a) 50 % b) 80 % c) 78 % 7) The percentage of oxygen gas in the atmosphere is.......................................... a) 25 % b) 21 % c) 40 % 8) The percentage of carbon dioxide gas in the atmosphere is..................................... a) 0.04 % b) 0.97 % c) 1 %

Atmosphere

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