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The Earth and atmosphere

Part of Chemistry

  • The Earth and atmosphere

    • Atmospheric pollution

      Many human activities release polluting gases into the atmosphere, such as farming animals for food, burning fossil fuels and deforestation.

    • Resources from the Earth

      Human activities use resources from the Earth. Many of these resources are finite, they will eventually run out.

    • Composition of the atmosphere

      The air in the atmosphere is a mixture of gases. Most of the atmosphere is nitrogen (80%) with around 20% oxygen and other trace gases.

    • What is methane?

      A visual explanation of methane.

    • What is carbon dioxide?

      Find out all about carbon dioxide

    • Structure of the Earth

      The Earth has a layered structure made up of the crust, the mantle, the outer core and the inner core. These layers each have different structures and properties.

    • Rock types

      There are three types of rocks on Earth, igneous, metamorphic and sedimentary. These are formed in different ways and have different properties.

    • The rock cycle

      Rocks are constantly due to different processes. This means rock types are changing between the three different rock types over millions of years. This is called the rock cycle.

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