What is the World Made Of

The Earth's Crust

Over 98% of the earth's crust is made of rocks and minerals. These contain the elements:
Silicon 46.6%
Oxygen 27.7%
Aluminum 8.1%
Iron5.0%
Calcium 3.6%
Sodium2.8%
Potassium2.6%
Magnesium2.1%

Hyperphysics

Table of abundance of all elements in the earth’s crust: Israel Science and Technology HomePage

Graphic of abundance of elements in the earth’s crust GRAPHIC

US Geological Survey Fact Sheet on Rare Earths

Great Basin Mine Watch

Mohave Mountains

Snow Canyon State Park

The Oceans

Composition of Ocean Water

The Air

Air contains:
Nitrogen 78%
Oxygen 21%
Argon 1%
Water
Other gases such as carbon dioxide, hydrogen and helium0.03%


Scottish Diving Medicine