AHSEC| CLASS 11| ENVIRONMENTAL EDUCATION| SOLVED PAPER - 2019| H.S.1ST YEAR
2019
Environmental Education
Full Marks: 40
Time: 2 hours
The figures in the margin indicate full marks for the questions.
1. (a) Express in one or two words: 1x5=5
(i) what the percentage of Carbon dioxide present in the atmosphere?
Ans:- 0.0391%
(ii) What is known as a group of individuals of the same species
present in an area at a given time?
Ans:- Population.
(iii) Given example of one non-renewable resource and one vehicular
emission causing air pollution.
Ans:- Example of non-renewable – Coal.
Example of vehicle emissions - carbon monoxide (CO).
(iv) Bhopal Gas disaster took place in which month and year?
Ans:- 1984, 2&3 December.
(v) In which month of the year ‘Road Safety Week’ is observed?
Ans:- 4th February to 10th
February.
(b) Fill in the blanks:
1x3=3
(i) Every food chain starts with a plant.
(ii) Pitcher plant is carnivorous
plant.
(iii) Motor Vehicles Act was implemented in the year 1988.
2. Write short account on any five of
the following: 2x5=10
(a) Abiotic components of environment
Ans:- Abiotic components: The non-living
things that affect the ecosystem are called abiotic components, those that
determine the functioning of the ecosystem are also called abiotic factors.
Air, water, minerals, soil, light, temperature, salt, wind, topography, wave
action, salinity and water logging etc. are abiotic components.
Ecosystems have many functions. The various functions of the
ecosystem are as follows -
(a) circulates between organisms leaving and non-leaving the
ecosystem.
(b) The flow of energy in the ecosystem is consumed by the
autotrophs at the time of their respiration, growth, and any other metabolic
reaction.
(c) Ecosystem exchanges biotic and abiotic substances. In an
ecosystem various components are linked together by dimensional and highly complex
interrelationships.
(d) Ecosystem adjusts a functional balance among the various
components.
(e) The ecosystem is achieved by several limitations, which are
called cybernetics.
(b) Food chain
Ans:- A food chain is a chain of
different types of organisms through which food energy flows in an ecosystem.
All food chains begin with a producer i.e., green plants which are the origin
of all food. There is a sequence in which one organism eats another organism in
order to survive. For example, in a grassland ecosystem the grass is eaten by
animals such as deer and the deer are in turn eaten by the lion.
An example of a food chain is:
Grass (producer) → Insects (herbivore) → Frog (carnivore) → Snake
(large carnivore) → Hawk (apex carnivore)
(c) Biopiracy
Ans:- Biopiracy is a form of procurement
of biological resources from a country or place and the subsequent patenting of
their products. The natives of some countries are the repositories of knowledge
and belief. Agents of some companies or other middlemen collect their knowledge
and valuable life material and later proceed for patenting themselves. Thus,
through unethical means they acquire the marketing rights of these products.
Many such cases are coming to the fore in different countries. Bio-piracy of
some high-value bioresources has been a major threat to biodiversity.
(d) Mineral resources of Assam
Ans:- The North Eastern region of India
is a treasure trove of valuable mineral resources. Meghalaya is famous for
uranium, coal, and limestone. Assam is widely known for its mineral resources.
Minerals explored in the state mainly include petroleum (crude), natural gas, coal,
and limestone. Oil and Natural Gas Commission (ONGC) is the most profitable
public sector organization in the state. Assam is endowed with varieties of
other minerals like asbestos, fire clay, kaolin, fuller's earth, mica, quartz,
dolomite etc. but extraction of most of these minerals is not economically
viable at present. The extraction of gold from the Sabantaire River dates to
the eighteenth century.
(e) Thermal pollution
Ans:- Thermal pollution is the
degradation of water quality by any process that changes the ambient water
temperature. When the water used as a coolant is returned to the natural
environment at a higher temperature, the sudden change in temperature reduces
the supply of oxygen and affects the structure of the ecosystem.
(f) Requirements for an International Driving Permit
Ans:- An International Driving Permit
(IDP), often (incorrectly) referred to as an International Driving License
(IDL), is any valid, legal identification document that allows the holder to
drive a private motor vehicle in any country or jurisdiction. Allows to run
that recognizes the document. To be valid, the IDP must be accompanied by a
valid driving license issued in the country of residence of the applicant. The
IDP, which is slightly larger than a passport in A6 size (148 x 105 mm), is a
multi-language translation of a driver's license from the issuing country,
complete with photograph and vital data. An IDP is not required if the driver's
domestic license meets the requirements of the 1968 convention; Domestic
licenses may be used directly in a foreign jurisdiction that is a party to that
convention.
(g) Greenhouse effect
Ans:- The greenhouse effect is the
process by which radiation from a planet's atmosphere heats the planet's
surface to temperatures above those without its atmosphere.
If a planet's atmosphere contains radiatively active gases (i.e.,
greenhouse gases) they will radiate energy in all directions. A portion of this
radiation is directed toward the surface, heating it. The intensity of the
downward radiation, ie the strength of the greenhouse effect – will depend on
the temperature of the atmosphere and the amount of greenhouse gases present in
the atmosphere.
Earth's natural greenhouse effect is important for supporting life.
Human activities, mainly the burning of fossil fuels and the clearing of
forests, have strengthened the greenhouse effect and caused global warming.
The term "greenhouse effect" is a misnomer that originated
from the effect of sunlight passing through glass and heating a greenhouse. The
way a greenhouse retains heat is fundamentally different, as a greenhouse works
mostly by reducing airflow so that warm air can be kept inside.
3. Define and distinguish any four of
the following: (2+1)x4=12
(a) Population and community
Ans:- In ecology, a community is a group
or association of populations of two or more different species living in the
same geographic area and at a particular time.
Difference between Population and Community:
Population: (i) It is a group of
individuals of the same species found in an area.
(ii) It is a
small unit of the organisation.
Community: (i) It is a group of
individuals of different species found in an area.
(ii) It is the larger unit of the organisation.
(b) Consumer and decomposer
Ans:- The relationship between producers, consumers and decomposers
is as follows:
Producers are green plants that capture solar energy and convert it into potential energy. All consumers such as animals and non-green plants directly or indirectly depend on plants for energy and decomposers are non-green micro-organisms that break down the complex organic compounds of dead remains of plants and animals and their products such as feces, urine etc. Let us break in simple substances.
***
BUY E-BOOK (PDF FILE)
[TO SEE FULL SOLUTION]
(Chapter wise Notes, Exam Question Papers solved, MCQ solved) [ARTS, COMMERCE, SCIENCE]
|
DOWNLOAD PAGE LINK:-CLICK HERE |
AHSEC PAGE LINK - CLICK HERE
Also Read: