This document defines the environment and its components. It begins by defining the environment as the circumstances and conditions that surround us and influence our lives. It then discusses the origin of the word "environment" and provides a classification of the environment into physical/natural and human. The key components of the environment discussed are the abiotic (lithosphere, hydrosphere, atmosphere) and biotic (producers, consumers, decomposers) factors. Producers are able to make their own food, while consumers depend on other organisms for nourishment. Decomposers break down dead organic matter and release nutrients. The document concludes by listing references and group members.

1. Introduction to environment
Think Globally
Act locally
Save environment….

2. Definition:
“The aggregate of all the circumstances, people, things,
and events around us that influence our life.”
“The circumstances, or conditions by which one is
surrounded.”
-Webster dictionary
Source: Environmental studies(F.Y.B.Com)
-Rashmi Desai (Vipul Prakashan)

3. Origin of Word „Environment?‟
French Word-
„environner‟
To encircle or surround

4. Classification of environment….
Environment
Physical/Natural
Human environment
environment
Cultural
Social
Land, air, water, etc. Plants and animals Economic
Political
environment

5. Components of environment…..
Abiotic components:
All those physical and chemical aspects of environment that
exert an influence on living organism.
(1)lithosphere:
SiAL(Silica+Aluminimum)
that make up landmasses or
continents.
SiMA(Silica+Magnesium)
that forms beds of oceans.

6. (2) Hydrosphere:
Includes all oceans, seas, lakes, rivers that cover 71%
of earth surface.

7. (3)Atmosphere:
 A 100% envelope around
earth.
 Air comprises of 78% nitrogen,
21% oxygen, 0.03% of carbon
dioxide and several other gases
in small quantities and varying
amounts of water vapour.
 It is approx. 320km thick.

8. Biotic components:
Include living organism i.e. plants, animals, man and their organisation
within the environment.
(1)Producer(autotrophic):
Able to make their own food by
trapping solar radiation with help of
chlorophyll. E.g. plants.
They convert light energy into
chemical potential energy.

9.  (2)Consumers(hetrotrophic):
They do not make their own food.
Dependent on other organism for their
nourishment.
They includes:
a) Primary consumer(HERBIVORES):
Consist of animal that feed on
green plants. E.g. grasshopper or cow.
b) Secondary
consumer(CARNIOVORES):
They Obtain energy by eating
herbivores. E.g. frog or tiger.
c) Tertiary consumer(OMNIVORES):
They feed secondary consumers.
E.g. snake or bear.

10.  (3)Micro consumers or detritivores:
 Include molluscs, earthworms, millipedes etc.
which feed on dead organic matter.
 (4)Decomposers or reducers:
 Include bacteria and fungi which breakdown complex compound of dead plants and
animals, absorb some of decomposition products and release mineral nutrients that
can be reused Primarily by PRODUCERS.

11. REFERENCES:
 Google/images
 Environmental studies(F.Y.B.Com)
-Rashmi Desai (Vipul Prakashan)

12. GROUP MEMBERS:
Pramita Nair 7201
Ankita Parandekar 7211
Yogesh Prajapati 7221
Siddhi Salunke 7231
Smruti Shirodkar 7241
Tushar Tari 7251
Jessy Vaz 7261

13. Thank you!
Your questions are welcomed to us….