The crust which is about 7 miles thick contains the all of the element metals we have discovered so far because no one has ever drilled all the way through the crust.
The core.
The core.
The core.
The core.
Inner core and outer core.
2
No. Venus is made of rock and metal, like Earth.
The other two layers of the Earth are the mantle and the core. The mantle is primarily composed of silicate minerals, while the core is mostly made of iron and nickel.
Earth's outer core is not made of rock. It is made of molten metal; mostly iron and nickel.
Thankfully, the solid layer of the Earth's crust is the outer, solid land we live on.
The Earth's inner core is solid because of the immense pressure from the layers of rock and metal above it, which keeps the inner core's temperature high enough to maintain a solid state despite being made mostly of iron and nickel.
Rock & metal