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4)A) Given the information in the table that I found, I figured out that the Crust could mostlikely be Basalt, Granite and Pagioclase feldspar (anorthite). The Mantle could be Peridotite or Olivine (forsterite), even though they are below the threshold, they are as close as could be. The core would hopefully be the last material, gold, but that is a lot more dense and from my calculations nothing is from the table. 5)A) The moon density would then be 60.5% of 23.12 is 13.9876 g/cm3. B)6)This indicates that the interior of mercury would be nearly impenetrable. The density inside of the planet must be heavy metals or anything that allows for a highly dense material. 7)The elemental composition of the solar system allows us to be able to exist in our current form. As we learned briefly, life forms are primarily composed of carbon, hydrogen etc. with that,a nickel/iron core, only we exist of all of that comes into equilibrium giving us the life we have on our rocky surface.