Advertisements
Advertisements
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
Advertisements
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
Give scientific reasons: We cannot distinguish colours in moonlight.
Give technical terms for The nerve which transmits impulses from the ear to the brain
State whether the following statements are true (T) or false (F). If false, correct them by changing any one single word in each.
Deafness is caused due to rupturing of the pinna.
With reference to the human ear, answer the question that follow:
Name the three small bones present in the middle ear. What is the biological term for them collectively ?
Name that part of ear which vibrates when outside sound falls on it.
Name the nerve which carries electrical impulses from the cochlea of ear to the brain.
Name the following:
Part of internal ear related to balance.
Draw a labeled diagram of the inner ear. Name the part of the inner ear that is responsible for static balance in human beings.
The part of the ear that turns pressure variations into electrical signals is ______.
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Eyes: Photoreceptors :: Ears : ______.
