All planets are made of gas, ice, rock and metal, and models of how planets form usually assume that these materials don't ...

Keep reading to learn more about Earth's different layers, its atmosphere, and what makes the "blue planet" unique. Earth is made out of different layers, and those layers get hotter and more ...

Many of these resources are finite, they will eventually run out. Composition of the atmosphere The air in ... The Earth has a layered structure made up of the crust, the mantle, the outer core ...