• Question: How does the earth have gravity from the core

    Asked by Lewistg123 to Chloe, Irene, Pierre, NULL, Uday on 13 Nov 2015.
    • Photo: NULL

      NULL answered on 13 Nov 2015:

      No one knows yet why there is gravity. All we know is that things that have mass (weight) are attracted to each other. And the bigger they are, the more attracted they are. Also the closer to each other things are, the more attracted they are.

      The earth’s core is really really huge, so it attracts lots of things to it, and we’re close enough to feel that as gravity.

    • Photo: Chloe Huseyin

      Chloe Huseyin answered on 13 Nov 2015:

      Ricardo explained it really well already..

      Gravity is the force that keeps us all here on Earth and causes things to fall to the ground. The gravity on the moon is less than the gravity on Earth so astronauts have to wear heavy boots on the moon so they don’t bounce off and float away.

    • Photo: Irene Regan

      Irene Regan answered on 19 Nov 2015:

      Great Q:)
      So Earth pulls us down (and we pull it up) because of it’s mass. Where does the gravity come from? Mostly from the metallic core of Earth.

      First of all, gravity is one of the four interactions, and it’s the weakest of them.
      Scientists are not 100% sure HOW gravity works and WHY. But it is known that an object with mass will pull an another object towards it.
      Gravity’s also a two-way force, meaning that Object A (100 kg) and Object B (500 kg) pull each other closer at the same force. But Object A will move a lot more, because it has lower mass than Object B.

      This also explains why black holes suck things. Black holes are collapsed “dead” stars which are extremely thick and high on mass.

      So Earth pulls us down (and we pull it up) because of it’s mass. Where does the gravity come from? Mostly from the metallic core of Earth.

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