Ecosystems: The soil

• Soil is an important part of the ecosystem
• It is a critical component of life on earth and agriculture
• Soil thickness varies from a few millimeters to a several meters in places
• Animals and plants interact with one another and with weathered rocks to form the soil
• Micro-organisms in the soil carry out recycling activities which release nutrients for plants to absorb
• The soil acts as a source of water and nutrients for plants
• The components of the soil can be divided into physical and biological components

To access more topics go to the Combined Science Notes page.