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Class VIII >> Science >> Pollution of Air and Water >> A1

Q1	Discharge of untreated industrial and domestic sewage into water bodies is one of the main causes of __________.
A	Air Pollution
B	Water Pollution
C	Noise Pollution
D	Soil Pollution

Q2	__________ is the rapid population growth of algae in water bodies due to the presence of nutrients brought in by rainwater.
A	Deforestation
B	Algal Bloom
C	Acid Rain
D	Afforestation

Q3	__________ refers to the contamination of the environment with substances that are harmful to living beings.
A	Global Warming
B	Deforestation
C	Pollution
D	Industrialization

Q4	Which of these are a source of air pollution?
A	Factories
B	Power Plants
C	Automobiles Exhausts
D	All of the Above

Q5	The substances that contaminate the air, water and soil are known as __________.
A	Pesticides
B	Biodegradable Wastes
C	Pollutants
D	Fossil Fuels

Q6	Name the method of purifying water that involves adding chlorine tablets to the water.
A	Sedimentation
B	Filtration
C	Chlorination
D	Distillation

Q8	Ground water is obtained from __________.
A	Wells
B	Waterfalls
C	Oceans
D	Rivers

Q9	The waste water generated from household activities is known as __________.
A	Smog
B	Sewage
C	Silt
D	Soot

Q10	Name the plan that aimed to reduce the pollution levels in an endangered river.
A	Ganga Action Plan
B	Kyoto Protocol
C	Chipko Movement
D	Narmada Bachao Andolan

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