7 Class.Geography.CW/HW.Chapter1.Components of Environments
7 Class. Geography.CW/HW.
Chapter1.Components of Environments
Keywords
biodiversity : it is a variety of life on earth comprising of plants,
animals and micro-organisms.
microbes : very small organisms.
national park : a well demarcated reserved area for the protection of wildlife.
It does not allow any human activity
ocean: vast expense of saline water on the
earth's surface.
wildlife sanctuary : a geographical area meant for the
conservation of biodiversity limited human activities are permitted.
Something To Know
A. Tick (v) the correct option
1. Which one is not a
part of biological environment?
(a) plants
(b) water
(c) animais
(d) human beings
2. Volcanoes erupt due
(a) Internal disturbance of the
earth.
(b) external disturbance of the earth
(c) climate change
(d) man -
made changes on the earth.
3. Which one brings a sudden change in the
environment?
(b) rainfall
(a) formation of a river
(c) growth of a plant
(d) formation of a mountain
4. Identify by the term that stands for the topmost
layer of the earth comprising of loose material
(a) minerals
(b) soil
(c) slal
(d) sima
5. in which year was the Wildlife Protection Act passed in
India?
(a) 1971
(b) 1972
(c) 1973
(d) 1974
B. Give a single term for each
of the following sentences,
1. A situation or condition in which an
organism lives,
2. The only planet in our solar system where life exists
is
3. The uppermost part of the lithosphere which is rich in cilice and aluminum
4. The sphere of air that anvelopes the earth.
5. Mass of
water on the earth's surface,
C Match the
following :
1 Physical environment includes a.Atmosphere
2 It is the most
dynamic in nature b. Human beings
3. A narrow zone
supporting wife c. Non - living things
4. They are capable of modifying environment d. Blosphere
5. Rocks rich in
silica and magnesium e. Sima
D. Answer the following questions in brief.
1. Name
the major components of the environment.
2: What is meant by Sima
and Sial?
3. Mention the distribution of water in the Northern and
Southern hemispheres.
4. Give the literal meaning of four spheres of
environment.
5. What is the atmosphere composed of?
E.
Answer the following questions.
1 Differentiate between the physical
and the biological environment
2. Why is the earth called the 'Blue Planet
3.
Define biosphere. Why is it important for us?
4. Explain
with the help of an example how physical and biological components of the
environment are interdependent.
5. Explain two ways in which human
beings are disturbing the natural environment.
Value Based Question
On 25 April 2015, a massive earthquake of 7.8 magnitude struck 77 km north -
west of Nepal's capital. Kathmandu. It was the most
powerful earthquake to have hit Nepal since 1934. It led to heavy loss of life
and property. During this earthquake four men were trapped under the
10 feet rubble. They were rescued by NASA technology, FINDER
(Finding individuals for Disaster and Emergency Response) which sensed their
heartbeats. This was the first time when this technology was used in
a real - life situation. This is indeed a big step towards disaster
management. But this, in no way, reduces our responsibilities as
human beings.
Under the circumstances, what best can we do after
such a disaster?
Suggest any five ways in which we can help
the victims of other types of disasters.
Map Skiil
(a) Gir National Park- lndia.
(b) Jim Corbett National Park- India
(c) Yellow Stone National Park- USA
(d) Serangeti National Park -Tanzania
(e) Fiord land National Park -New Zealand.
Something
To Do
1. Hold a clam discusion on wood and bad an environment
2. Prepare a
colored dlegram showing different phares of the environment
3. Prepare 20
fashcards showing the wildlife species of India (flora and founa both). In the class showing one flash card at a time .For every card ask the questions ,like.
(a) Who has seen it live and where?
(b) if not, where can we see it live ?
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