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प्रश्न
How depletion of the ozone layer affect living organisms?
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उत्तर
- The thinning of the ozone layer results in an increase in the levels of UV radiation reaching the earth’s surface. In humans, increased UV radiation causes ageing of the skin, damage/injuries to skin cells and skin cancers including melanoma.
- It also causes cataracts and even permanent damage to the cornea, weakening of immune system. UV radiation also causes mutations in living organisms.
- DNA and proteins of living cells absorb the UV rays, and high energy of UV radiation breaks the chemical bonds of these molecules, thus affecting normal metabolism.
- UV radiation inhibits photosynthesis in most phytoplanktons as it penetrates through the ocean water. This affects the entire food chain in the aquatic ecosystem.
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संबंधित प्रश्न
Ozone depletion is occurring widely in the stratosphere; it leads to an ozone hole caused mainly due to ______.
Explain how, harmful ultraviolet radiations of sunlight are prevented from reaching the earth's surface.
Write the harmful effects of ozone depletion.
O2 is converted into O3 by the action of :
(a) infrared radiations
(b) ultraviolet radiations
(c) gamma radiations
(d) cosmic radiations
The gas A is used by most of the animals to obtain energy from food by the process of respiration. When A is acted upon by radiation X, it gets converted into another gas B which is an allotrope of A but poisonous when inhaled. B forms a kind of layer C in the upper atmosphere which absorbs radiations X coming from a source Y and prevent them from reaching the earth. Some chemicals Z released from the various devices on the earth are destroying the layer C slowly. In fact, a hole has already been formed in layer C over the area D of the earth.
(a) What are gases (i) A, and (ii) B? Write their molecular formulae.
(b) Name the layer C.
(c) What are (i) X, (ii) Y, and (iii) Z?
(d) Name the area D.
(e) Name any two human ailments which may be caused by X.
The following picture depicts a certain phenomenon
- Name the phenomenon and explain it.
- Enlist the sources that are responsible for the above mentioned phenomenon.
- List out the effects of the above phenomenon on humans.
The depletion of the ozone layer is due to ______.
State the role of chlorofluorocarbons in ozone destruction or depletion [no equations required].
Name or state the following:
The atom which reacts with oxygen to form ozone.
Which of the following radiations is responsible for the conversion of atmospheric oxygen to ozone?
