• Question: How is there oxygen and gravity on earth

    Asked by 686ghtg46 to Moises, Dervil on 9 Nov 2016.
    • Photo: Moises Jezzini

      Moises Jezzini answered on 9 Nov 2016:

      Well, first there is gravity in earth because earth has a lot of mass. What I know about gravity is that it only exist for objects that have mass. So earth is very big, that means it has a lot of mass and that is why we have gravity.

      We have oxygen in our atmosphere thanks to the gravity. The air and the oxygen in it does not go to the space because it is attracted by gravity to the earth.

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