If the mantle of the earth was removed leaving a shell just the crust would Earth's Gravity change?

Answer 1

Bit of a dumb question , but yes... as mass is reduced so is the gravitational pull of the Earth.

Answer 2

The amount of gravity an object has depends on its mass -- since the mantle makes up a good chunk of the earth's mass removing it would make a huge difference in the earth's gravity. It would not leave a shell though -- without the mantle to support it, the crust would be crushed down onto the core.

Answer 3

I am assuming that the core is remaining: Gravity = G(m1)(m2)/r-squared... if you removed Earth's mantle you would be changing both the mass of the Earth and the radius (the crust would then be right on top of the outer core). Since the smaller mass would make gravity weaker and the smaller radius would make it stronger it is possible for the two to cancel eachother out and gravity to remain unchanged, although I doubt that would happen. So I'd say yes, Earth's gravity would change.

If the core was removed also and somehow the Earth retained it's radius then you'd only be changing the mass of the Earth and gravity would definitely change (it would be weaker)