• Question: why is the world round

    Asked by Liv to Pierre, Lisa, Kate, Jos, Joe on 17 Nov 2014. This question was also asked by Blackstallion.
    • Photo: Kate Dobson

      Kate Dobson answered on 17 Nov 2014:

      The earth is round becasue of gravity. Gravity tries to pull all mass togther and so if you imaging pulling everything togther very hard, the most efficient shape you can make is a sphere. Any obejct bigger than about 1000km across tries to form a sphere under gravity. The Earth is’t completely sphericla thoghm it bulges at the middle beacuse of the forces generated by it spinning.

    • Photo: Lisa Simmons

      Lisa Simmons answered on 18 Nov 2014:

      Gravity, for the reasons that Kate has said

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