Biomes and Biosphere Overview
The biosphere is all life on Earth.
About this topic
The biosphere is the global sum of all ecosystems, the zone of Earth where life exists, from the deep ocean to the lower atmosphere. It is made of the lithosphere (land), hydrosphere (water) and atmosphere, and all interact through the cycles of carbon, nitrogen and water.
Life depends on energy from the Sun, liquid water, suitable temperatures and nutrients. Because spheres are connected, a change in one affects the others: a volcanic eruption adds ash to the atmosphere, cooling climate and changing growth; ocean currents carry heat that decides land climates. Humans now influence the whole biosphere.
The biosphere is divided into biomes, large regions shaped by climate, such as forests, deserts and tundra, and aquatic zones. Living things are found even in extreme places, like hydrothermal vents deep in the ocean, where bacteria use chemicals instead of light to make food (chemosynthesis). The thin layer of life is tiny compared with the planet, like the skin of an apple.
Studying the whole system helps us understand global warming and plan sustainable resource use. A common mistake is thinking the biosphere is a place separate from the other spheres; it overlaps them. Earth acts as a nearly closed system for matter but an open system for energy.
Key ideas
- Land, water and air
- Interconnected cycles
- Humans depend on it
Quick check
Use cases: where Biomes and Biosphere Overview helps
- Homework: review the key idea behind Biomes and Biosphere Overview before you start a problem set.
- Exam revision: use the quick check to test whether you can recall Biomes and Biosphere Overview without notes.
- Visual learning: play with the interactive lab to see how Biomes and Biosphere Overview changes when you adjust its inputs.
- Teaching a friend: explain Biomes and Biosphere Overview in your own words, then compare your version with the key ideas.
Biology underpins medicine, farming, conservation and biotechnology.
Frequently asked questions
What is Biomes and Biosphere Overview?
The biosphere is all life on Earth.
What will I learn in Biomes and Biosphere Overview?
Land, water and air. Interconnected cycles. Humans depend on it.
Is Biomes and Biosphere Overview part of Biology?
Yes. It is one of 150 Biology topics on LearnViz HighSchoolEdu, with 3 key ideas, a live animation and a quick check.
Does the Biomes and Biosphere Overview lab work on a phone or tablet?
Yes. The animation resizes to fit your screen and supports touch, so you can drag, tap and slide with your finger.
How should I study Biomes and Biosphere Overview?
Read the summary and key ideas first, play with the interactive lab to see the idea in motion, then answer the quick check. If you get a question wrong, go back to the key idea it tests.
Do I need an account, and is my progress saved?
No account is needed. Marking a topic as learned is saved in your own browser, so it stays on that device and is not sent to a server.