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9 questions · timed · auto-graded

Question 12 Marks
The picture below shows a campaign recently started by the Indian Government.
Image
Who launched this campaign and when?
Answer
The picture shows the cleanliness campaign called Swachh Bharat Abhiyan recently started by the Indian Government.
This campaign was launched on $2^{nd}$ October 2014 by Indian Prime Minister Narendra Modi.
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Question 22 Marks
The following picture depicts a certain phenomenon. Image
List out the effects of the above phenomenon on humans.
Answer
Effects of ozone layer depletion on humans:
  • Sun burn
  • Genetic disorders
  • Skin cancer
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Question 32 Marks
The following picture depicts a certain phenomenon.
Image
Name the phenomenon and explain it.
Answer
Ozone layer depletion is a phenomenon in which certain gaseous compounds such as chlorofluorocarbons (CFCs) break down into chlorine atoms which in turn break down ozone ($O_3$​​​​​​​) into oxygen ($O_2​​​​​​​$​​​​​​​) and O.
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Question 42 Marks
Look at the cartoonist's presentation of a kind of pollution given below and

Mention any two harmful effects of this pollution.
Answer
Effects of noise pollution:
I. It lowers efficiency of work.
II. It disturbs sleep and leads to nervous irritability.
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Question 52 Marks
Mention any two measures to minimise noise pollution.
Answer
Measures to minimise noise pollution:
(i) Use of loud speakers should be banned.
(ii) Airports should be located away from the residential area.
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Question 62 Marks
List the three major constituents of sewage.
Answer
Three major constituents of sewage:
  • Kitchen wastes
  • Sanitary waste
  • Waste from agricultural lands
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Question 72 Marks
List two major harmful effects of the following:
Prolonged noise such as the one produced by crackers
Answer
Prolonged noise such as the one produced by crackers :
(a) Prolonged exposure to the high decibel noise damages ear drums and can bring permanent hearing impairment.
(b) Noise pollution can lead to high blood pressure (hypertension), constant headache, lack of concentration.
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Question 82 Marks
List two major harmful effects of the following:
Pesticides such as DDT used in agriculture.
Answer
Pesticides such as DDT used in agriculture:
(a) Pesticides kill soil microbes which are responsible to recycle the nutrients in the soil.
(b) Pesticides can enter the food chain and affect the health of humans as well as animals. It can cause damage to the lungs and central nervous system, failures of reproductive organs and dysfunctions of the immune system, endocrine system, and exocrine system, as well as potential cancer risks and birth defects
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Question 92 Marks
List two major harmful effects of the following:
Rivers contaminated with sewage.
Answer
Rivers contaminated with sewage:
(a) A number of waterborne diseases are produced by the pathogens present in polluted water, affecting humans as well as animals.
(b) The flora and fauna of rivers, sea and oceans is adversely affected.
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[2 Mark Question Answer] - Biology STD 10 Questions - Vidyadip