Question 1:Answer the following questions.(i) What is an ecosystem?(ii) What do you mean by natural environment?(iii) Which are the major c…

Answer:
(i) Plants, animals and human beings depend on their immediate
surroundings. They are often interdependent on each other as well.
These relations of dependence and interdependence together constitute
an ecosystem.
In
other words, an ecosystem is the system formed
as a result of the interactions of all living organisms with each
other, and with the physical and chemical factors of the environment
in which they live.
(ii) The environment that consists of all objects created by nature is
called natural environment. The natural environment comprises land,
water, air, plants and animals.
(iii) The major components of environment are natural environment (consists
of all objects created by nature), human environment (consists of
human beings) and human-made environment (consists of objects created
by human beings).
(iv) Parks, buildings, roads and industries are some examples of
human-made environment.
(v) Lithosphere (or the domain of land) is the solid crust or the hard
top layer of the Earth. It is made up of rocks and minerals, and is
covered by a thin layer of soil. It is an irregular surface with
various landforms such as mountains, plateaus, plains and valleys.
(vi) The two major components of biotic environment are plants and
animals.
(vii) Biosphere is the narrow zone of the Earth where land, water and air
interact with each other to support life.