Answer: 
Explanation:
We know that force acting on an object due to Earth's gravity on the surface is given by:
where g is the acceleration due to gravity, r would be radius of Earth, M is the mass of Earth and G is the gravitational constant.
It is given that at pole, g = 9.830 m/s² and r = 6371 km = 6371 × 10³ m
Hence, Earth's mass is 
A neutron star has more mass than a bowling ball,
and is about the same size as Chicago.
The answer would be flood basalt. This is the outcome
of a huge volcanic eruption or sequence of eruptions that covers large expanses
of land or the ocean floor with basalt lava. The development and
effects of a flood basalt hinge on a variety of factors, like latitude, continental
configuration, rate, volume, period of eruption, the preexisting climate
state, style and location, and the biota flexibility to alteration.
The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
