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SAI INTERNATIONAL SCHOOL
Class-7

Home Assignment
Subject-Physics
Ch.- Water: The Life-giving Liquid

Subtopic- Scarcity of Water & Water Conservation

INSTRUCTIONS:
Please solve or paste the worksheet in the Physics Copy.
For Assertion& Reason question follow the following directions.
DIRECTION: Each of these questions contains an Assertion followed by Reason. Read
them carefully and answer the question on the basis of following options. You have to
select the one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of
Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of
Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If Assertion is incorrect but Reason is correct
(e) If Assertion & Reason both are incorrect.
Sl.No QUESTIONS MARKS

Assertion: Rainwater harvesting is the collection of 1
rainwater falling on roofs of buildings.
1
Reason: Global warming is tremendously responsible for
water scarcity in the world.
The method of collecting rainwater from the rooftop of a 1
2
building through pipes into water tank is called………….
The increase in the global temperature causes changes 1
3
in the seasons. (True/False)
4 Scarcity of water is experienced because of population 1
growth. (True/False)
The collection of rainwater falling on roof buildings called 1
a) Deforestation
5
b) Rainwater harvesting
c) Scarcity of water
d) All of the above
Which of these is not a reason for water scarcity? 1
a) Global warming
6 b) Water Pollution
c) Industrialisation
d) Rainwater harvesting
What is Rainwater harvesting? 1
7

Write down the major causes of water scarcity. 2
8