1. every planet in the solar system is surrounded by a group of gases, they as a blanket that protects them from the sun and other celestial objects that may enter thier planet . what do you call this group of gases


A. asthenospher B. atmosphere C. biosphere D. lithosphere


2. which of the following event is observed in the troposphere


A.satellites fly in this layer B. meteors burn in this lawyer

C. clouds are formed here D.auroras are abserved


3.jetn planes are faast fliying planes, which layer of in the atmosphere these planes fly?


A.exophere B. stratosphere C.mesosphere D.troposphere


4.whichof the following event is observed in the stratosphere


A.exosphere B.mesosphere C. stratosphere D.thermosphere


5.which of the folloeing events is observed in the stratosphere?


A. clouds B.hot air ballon C.statellites D.space crafts


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