Bombay Scottish School, Mahim
PRELIMINARY ASSESSMENT
ENVIRONMENTAL SCIENCE
Grade :12 Max Marks : 70
Date : 5.2.2021 No. of Questions : 10
Duration: 3 hours No.of Printed Sides : 04
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(Candidates are allowed an additional 15 minutes for only reading the
paper.
They must NOT start writing during this time.)
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Answer Question 1 (compulsory) from Part I and five questions from Part
II, choosing at least one question from each of the Sections A, B and C.
The intended marks for questions or parts of questions are given in brackets
[ ].
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PART I (20 Marks)
Answer all questions.
Question 1 [10 x 2]
1. What do you understand by sustainable development?
2. Mention and explain any two factors that cause population change.
3. Mention any two chemical indicators of soil quality.
4. Differentiate between immigration and emigration.
5. Mention any two disadvantages of macro- irrigation.
6. Explain any two ways by which a country can acquire carbon credits.
7. Write the full form of each of the following:
(i) GATT
(ii) IPR
8. Define Toxic waste trade.
9. Differentiate between insitu and exsitu wildlife conservation
10. Define carrying capacity. State any two factors that determine the
carrying capacity of an ecosystem.
PART II (50 Marks)
Answer five questions in all, choosing at least one question
from each of the Sections A, B, and C.
SECTION A
Question 2
(a) What are life strategies? State their types. Mention any four
characteristics of each type stated by you. [6]
(b) What is ozone layer depletion? Mention any two steps that would
control ozone layer depletion. [4]
Question 3
(a) What is JFM? State its objectives. [6]
(b) Explain the two types of externalities with two suitable examples of
each. [4]
Question 4
(a) Define population. Explain any three factors that affect the birth rate
and any two factors that affect the death rate in the human
population. [6]
(b) Discuss the basic Gandhian approach for rural development.
Explain how Gandhian approach can affect the present growing
population of a particular place. [4]
SECTION B
Question 5
(a) How was colonial agriculture different from pre-colonial agriculture?
Discuss two negative impacts and two positive impacts of colonial
agriculture. [6]
(b) Write a short note on Earth First. [4]
Question 6
(a) What is NAMP? Discuss any five objectives of NAMP. [6]
(b) What is meant by a survivorship curve? Explain the three shapes of
survivorship curves. [4]
Question 7
(a) Describe the physical indicators of soil quality. [6]
(b) Explain any four ways to reduce vehicular pollution. [4]
SECTION C
Question 8
(a) What is IPM? Discuss any three ways to implement IPM. [6]
(b) Define water pollution. Mention any four sources of water pollution.
Explain how the quality of water can be attained by the turbidity and
the pH level. [4]
Question 9
(a) What is meant by Cost Benefit Analysis? Mention any three
advantages and two disadvantages of Cost benefit analysis. [6]
(b) Discuss urban development planning and traffic management
methods in Curitiba. [4]
Question 10
(a) What is meant by Globalization ? Discuss any six advantages of
Globalization. Mention any four impacts of globalization on the
environment. [6]
(b) Explain in detail any four ways by which sustainability can be
achieved in the field of agriculture. [4]
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