Earth

**RLS0812** · 08-03-2016, 09:12 AM

From HERE:
""Earth's crust is made up of several elements: oxygen, 47 percent; silicon, 27 percent; aluminum, 8 percent; iron, 5 percent; calcium, 4 percent; magnesium, potassium and sodium, 2 percent""

**nutpie** · 08-04-2016, 04:27 AM

Originally Posted by RLS0812

From HERE:
""Earth's crust is made up of several elements: oxygen, 47 percent; silicon, 27 percent; aluminum, 8 percent; iron, 5 percent; calcium, 4 percent; magnesium, potassium and sodium, 2 percent""

In the earth's crust; that's a start. We know the core is solid iron. The outer core is molten iron/nickle, Stainless Steel? Haha. The upper mantle and lower mantle?