Why did he??????
................................
Earth's atmosphere is 78%<span> nitrogen </span>21%<span> oxygen, </span>0.9%<span> argon, and </span>0.03%<span> carbon dioxide with very small percentages of other elements.
hope it helps</span>
it goes sedimentary rock to metamorphic is heat and pressure
then metamorphic to magma is melting and magma to igneous rock is crystallization
Thats all i got