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Hesc105 - Hjnnn
Course: classical mechanics (CMS1)
4 Documents
Students shared 4 documents in this course
University: Anna University
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COAL AND PETROLEUM
COAL AND PETROLEUM
Can air, water and soil be exhausted
by human activities? You have already
studied about water in Class VII. Is water
a limitless resource?
In the light of the availability of
various resources in nature, natural
resources can be broadly classified
into two kinds:
(i) Inexhaustible Natural Resources:
These resources are present in unlimited
quantity in nature and are not likely to
be exhausted by human activities.
Examples are: sunlight, air.
(ii) Exhaustible Natural Resources: The
amount of these resources in nature is
limited. They can be exhausted by
human activities. Examples of these
resources are forests, wildlife, minerals,
coal, petroleum, natural gas etc.
Activity 5.2
(It is a group activity)
Take some containers. Fill them
with popcorn/peanuts/roasted
gram/toffees. Divide students into
groups of seven each. Further divide
each group into three subgroups
containing 1, 2 and 4 students.
Label them as first, second
and third generation respectively.
We use various materials for our
basic needs. Some of them are
found in nature and some
have been made by human efforts.
Activity 5.1
Make a list of various materials used
by us in daily life and classify them
as natural and man-made.
Natural Man-made
Can we use all our
natural resources
forever ?
Does this list include air, water, soil
and minerals? Since all these are
obtained from nature, they are called
natural resources.
2022-23