Of course: water, gases, thousand of minerals and rocks.
All those metals are considered to be Earth Elements, or substances that can be found on Earth and are pure since they can not be broken down into any other substances.
metal
Molten substances that appear at the surface of the Earth include lava, which is molten rock that flows out of volcanoes during eruptions, and magma, which is molten rock beneath the Earth's surface. These molten substances can solidify into igneous rock as they cool.
The crystalline substances that are found naturally in the earth are known as minerals. There are literally hundreds of minerals on Earth that are used in everything from industrial purposes to consumption.
minerals
it reuses it
Water.
Oxygen
c20
water
No, I wouldn't be crushed at the center of the Earth. The pressure at the center of the Earth is so high that all substances exist as a dense, solid core. Any object or being at the center of the Earth would be fully compressed into the dense core and wouldn't feel any crushing force.
The scientific study of the structure and solid substances of the Earth is: Geology