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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
Write short notes on the following Ear ossicles
find odd one from following: Malleus, iris, Stapes, Incus.
(i) Draw a well labelled diagram of the membranous labyrinth found in the inner ear.
(ii) Based on the diagram drawn above in (i) give a suitable term for each of the following descriptions :
1. The sensory cells that helps in hearing.
2. The part that is responsible for static balance of the body.
3. The membrane covered opening that connects the middle ear to the inner ear.
4. The fluid present in the middle chamber of cochlea.
5. The structure that maintains dynamic equilibrium of the body.
Name the three tiny bones present in the middle part of ear.
Give the main function of the following:
Cochlea
Write whether the following is true or false:
Vitreous chamber is present in ear in humans.
Complete the following sentence with appropriate word :
________ is the organ of balance and hearing in the body.
Select the CORRECT match of part of the human ear and its function.
______ is the smallest bone in the human body.
The part of the inner ear which is responsible for hearing is ______.
