Question

18
Essential ICSE Geography for Class 7
1,000 km
8. In spring every year, the largest ozone hole forms over the
(a) North Pole
MESOSPHERE
(b) South Pole
(c) Equator
(d) Pacific Ocean
satellite
9. Which parts have been wrongly labelled in the diagram?
(a) troposphere and stratosphere
450 km
(b) ozonosphere and ionosphere
(c) exosphere, ozonosphere and ionosphere
(d) exosphere, mesosphere, ozonosphere and ionosphere
Ozonosphere
THERMOSPHERE
80 km
meteor
EXSOSPHERE
50 km
onosphere
STRATOSPHERE
+18 km
Mt Everest
airliner
8 km-
TROPOSPHERE
North Pole
Equator
TL:​

Answer 1

Answer:

8) b

The Antarctic ozone hole forms during the Southern Hemisphere's late winter as the returning Sun's rays start ozone-depleting reactions. Cold winter temperatures persisting into the spring enable the ozone depletion process, which is why the “hole” forms over Antarctica.

Explanation:

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