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प्रश्न
Given below is a representation of a kind of pollution. Study the same and answer the questions that follow
(i) Name the kind of pollution.
(ii) List any three common sources of this pollution.
(iii) Mention three harmful effects of this pollution on human health.
(iv) Explain the term ‘Pollutant’.
(v) Name two soil pollutants
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उत्तर
(i) Noise pollution
(ii) Sources of noise pollution:
- Use of loudspeakers and musical bands in public places
- Sounds generated by industrial machines
- Landing and taking off of aeroplanes, jets and other aircraft
(iii) Harmful effects of noise pollution on human health:
- Loud sounds cause damage to the ear drum which can lead to deafness
- Lowered work efficiency
- Nervous irritability
(iv) Any substance which causes pollution is called a pollutant.
(v) Plastic and radioactive substances are soil pollutants.
APPEARS IN
संबंधित प्रश्न
For human ears, the audible range is 20 Hz to 20,000 Hz.
Deafness is causal due to the rupturing of the Pinna.
What is the function of ear ossicles?
Name the following:
The ear ossicle attached to the tympanum.
The diagram alongside represents the structure of the human ear.
(i) Write the names of the parts labelled a to g.
(ii) State briefly the functions of the parts b, d, and g.
(iii) Name the main division of the ear.
(iv) Which is the smallest bone in the human body?
(v) What is labyrinth?
Choose the correct answer :
Organ of corti is found in ___________
Mention, if the following statement is True or False
Cochlea of the ear is concerned with the sense of balance.
State the functions of the following:
Semi-circular canals
______ is the smallest bone in the human body.
With reference to human ear answer the question that follow:
Name the part of the ear associated with the amplification of vibrations.
