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Teaching Pedagogy Concept and Scope Of EVS Question Bank Questions - Concept and Scope of Environmental Studies

  • question_answer
    Which two gases make up 99% of the atmosphere?             (UPTET Feb 2014)

    A) Ozone and oxygen

    B) Oxygen and nitrogen

    C) Carbondioxide and ozone

    D) Argon and ozone

    Correct Answer: B

    Solution :

    The atmosphere is a mixture of gases. It includes nitrogen (78%), oxygen (21%) and other gases (1%) such as carbon dioxide (0.039%), argon (0.93%) and the rest are trace gases. Alone nitrogen and oxygen gases form 99% of the atmosphere.


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