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.
Links
- External linkExternal link
- External linkExternal link
- SubscriptionSubscription
- External linkExternal link
- External linkExternal link
- External linkExternal link
- SubscriptionSubscription