Mercury may have lost part of its mantle and crust to a leaving it with a large, metal .

volcano, crust

giant impact, mantle

explosion, surface

giant impact, core

Giant impact and metalcore.

Explanation :

Mercury has a large core of liquid metal. The metal core is of iron metal.The core is surrounded by a mantle which is made up of silica and a solid outer crust.In the case of Mercury, the total core percentage is 42% of the planet while the Earth's core is only 17% of the planet.Mercury has lost part of its mantle and crust that left the mercury with a large metal core.

They both go downwards and the can break apart rocks 

Hello! mitosis and meiosis are the same, because they are both ways of dividing cells and reproducing cells. they are different in many ways, but the main one is that meiosis splits the number of chromosomes in 1/2, while the number of chromosomes remains the same for mitosis. plus, meiosis has two stage of division, unlike mitosis, where it has only one.