Page 1 - H.A-2 (PRACTICE WORKSHEET)

SAI INTERNATIONAL SCHOOL
STD-VII
SUBJECT - CHEMISTRY

TOPIC-MANAGEMENT OF WASTE WATER
SUB TOPIC-STEPS TO PREVENT WATER POLLUTIOIN
PRACTICE WORKSHEET-3

Q. Questions Skill Marks
No.

1. Fill in the blank:- U 1

Dried …….is used as manure.

2.  For Assertion& Reason question follow the U 1
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

Assertion- Poor sanitation and contaminated
drinking water cause water pollution.
Reasoning- Polluted water as it contains a number
of harmful microorganisms.

3. U 1
Assertion- Open drains are the breeding places of
flies.

Reasonin- For maintaining sanitation drains should
be opened.

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