AHSEC| CLASS 11| ENVIRONMENTAL EDUCATION| SOLVED PAPER - 2015| H.S.1ST YEAR
2015
ENVIRONMENTAL EDUCATION
Full Marks: 30
Pass Marks: 12
Time: 1 hours
The figures in the margin indicate full marks for the questions
1. Fill in the blanks: 1×5=5
(a) The
components of biotic environment are air, temperature and
moisture.
(b) Population is a group of individuals of the
same species occupying a given area at a given time.
(c) The
Wildlife Protection Act was enacted in the year 1972
in India.
(d)
Groundwater is a non-renewable kind
of natural resource.
(e) The
causal organism of cholera is vibrio.
2. Write very short answers of the following: 1×5=5
(a) What is
the role of ozone present in the stratosphere?
Ans:-
Ozone is a gas in the atmosphere that protects everything living on Earth from
harmful ultraviolet (UV) rays from the Sun. Without the ozone layer in the atmosphere,
it would be very difficult for anything to survive on the surface.
(b) What is
trophic level?
Ans:-
Each organism in an ecosystem can be assigned a food level, called a trophic
level. Living organisms which obtain energy from the same source are said to be
of the same trophic level. Thus, green plants would be grouped in the first
trophic level (producers), herbivores in the second trophic level (primary
consumers), carnivores in the third (secondary consumers) and so on.
(c) Mention
two conservative measures for land resource.
Ans:- Here
are two conservative measures for land resources:-
(i)
Afforestation: It is the process of planting trees in deforested areas.
Trees help prevent soil erosion and improve soil quality. They also provide
habitat to wildlife and help regulate the climate.
(ii) Proper
grazing management: It means controlling the number of animals grazing on a
piece of land. Overgrazing can damage the soil and cause erosion. By properly
managing grazing, it is possible to protect the soil and keep the land
productive.
(d) Name any
two principal pollutants emitted by vehicles.
Ans:- Air Pollution & Voice Pollution.
(e) Write the
full form of WCED
Ans:-
World Commission on Environment and Development.
3. Answer any five questions from the following: 2x5=10
***
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