Biosphere

Definition

The biosphere is the global sum of all ecosystems, encompassing all living organisms and their relationships with each other and their environments. It includes land, water, and the atmosphere where life exists and interacts.

5 Must Know Facts For Your Next Test

1. The biosphere extends from the deepest ocean floors to about 8 kilometers above sea level in the atmosphere.
2. It is divided into biomes, which are large regions characterized by specific types of climate, plants, and animals.
3. The biosphere plays a crucial role in regulating Earth's climate through processes like photosynthesis and respiration.
4. Human activities such as deforestation, pollution, and climate change significantly impact the biosphere.
5. Biospheric studies help scientists understand biodiversity patterns and the impacts of environmental changes on ecosystems.

Review Questions

• What components make up the biosphere?
• How does the biosphere interact with other Earth systems like the atmosphere and hydrosphere?
• Why is it important to study human impacts on the biosphere?

Related terms

Ecosystem: A community of living organisms interacting with their physical environment.

Biome: A large naturally occurring community of flora and fauna occupying a major habitat.

Biodiversity: The variety of life in a particular habitat or ecosystem.