The biosphere contains all ecosystems on earth.
It is made up of living organisms and places where life exists.
The biosphere has existed as long as life on earth has.
There is a complex food chain within the biosphere.
Organisms feed on other organisms, and when they die they decomposing bodies nurture other organisms.
This allows the cycle of life to continue in a biosphere.
The biosphere encompasses many different ecosystems.
From rainforest canopies to coral reefs, all are a part of the biosphere.
Living and nonliving things in the biosphere are seen as a single unit.
The earth’s biosphere is about 3.5 billion years old.