The document discusses different types of ecosystems. It defines an ecosystem as the interactions between organisms and their environment, including sunlight. There are two main types of ecosystems - aquatic ecosystems like freshwater and marine, and terrestrial ecosystems found only on land like grasslands and mountains. The atmosphere surrounds the Earth and contains gases like nitrogen, oxygen, and carbon dioxide that living things use.

1. In biology and ecology the environment is all of
the natural materials and living things, including
sunlight.
*

2. *
*the branch of
biology that deals
with the relations
of organisms to
one another and
to their physical
surroundings

3. *
*The ecosystems are
of many different
types and are
classified based on a
number of factors .
Basically there are
two types of
ecosystems, the
aquatic ecosystems
and the terrestrial
ecosystems.

4. *
*An ecosystem
which exists in
a body of water
is known as an
aquatic
ecosystem.

5. *
* freshwater
ecosystems
* marine
ecosystems

6. *
*The
ecosystem
which is
found only on
landforms is
known as the
terrestrial
ecosystem

7. *
*the grassland
ecosystems
*the mountain
ecosystems
atmosphere

8. *
*Atmosphere of Earth,
which is mostly nitrogen,
also contains oxygen used
by
most organisms for respirat
ion and carbon
dioxide used by plants

9. *Thermosphere
*Mesosphere
*Stratosphere
*Troposphere

10. *
*Biodiversit
y refers to
the variety
of life and
its
processes.

11. *
*All major
components of the
environment viz., Air,
Water, Land, Energy
and Living beings
including man are
inter-related and
inter- connected in
one way or the other