NCERT Important Questions for Class 9 Social Science Geography Chapter 4
Social Science Class 9 Geography
Climate 4
Important Questions
1 Marks Questions
What do you mean by Jet stream?
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Jet stream are a narrow belt of high altitude (above 12,000 m) westerly winds in the troposphere. Their speed varies from about 110 km/h in summer to about 184 km/h in winter.
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