Biodiversity

The distribution of organisms in a habitat may be affected by physical factors, such as temperature and light.

The Sun is the original source of energy for almost all organisms on the Earth. The way energy passes through an ecosystem is described as energy flow.

Within an ecosystem, why are nutrients (such as carbon or nitrogen) continually recycled?

What are the consequences of global warming and how can its effects be reduced?

Nitrogen gas makes up 78% of Earth’s atmosphere and is an essential component in amino acids and proteins.