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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.
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संबंधित प्रश्न
Explain how the human ear works.
Name that part of ear which vibrates when outside sound falls on it.
What is the function of three tiny bones in the ear ?
Why should we not put a pin or pencil in our ears ?
Write whether the following is true or false:
Vitreous chamber is present in ear in humans.
Differentiate between:
The middle ear and Inner ear.
Name the following:
The ear ossicle in contact with the oval window of the inner ear.
The following diagram refers to the ear of a mammal.
(i) Label the parts 1 to 10 to which the guidelines point.
(ii) Which structure:
(a) converts sound waves into mechanical vibrations?
(b) Converts vibrations into nerve impulses?
(c) Responds to change in position?
(d) Transmits impulses to the brain?
(e) Equalizes atmospheric pressure and pressure in the ear.
Select the option with incorrect identification:
With reference to human ear answer the question that follow:
Name the part of the ear associated with the amplification of vibrations.
