Class 9 Social Science - ODISHA
Climate
The chapter 'Climate' in Class 9 Social Science for Odisha (BSE) students explores the atmospheric conditions of India over a long period, distinguishing between weather and climate. It highlights the factors influencing India's climate, such as latitude, altitude, pressure, and winds. Special focus is given to the Monsoon mechanism, the onset and withdrawal of the monsoon, and its unifying influence on the Indian subcontinent. Students will also learn about the different seasons in India—cold weather, hot weather, advancing monsoon, and retreating monsoon—and the spatial distribution of rainfall, particularly concerning Odisha.
Start Learning FreeKey Concepts
Weather
The state of the atmosphere over an area at any given point in time, which can change rapidly from day to day.
Climate
The sum total of weather conditions and variations over a large area for a long period of time, usually over 30 years.
Monsoon
Derived from the Arabic word 'mausim', it refers to the complete seasonal reversal in wind direction during a year.
Coriolis Force
An apparent force caused by the earth's rotation that deflects winds to the right in the northern hemisphere and to the left in the southern hemisphere.
Jet Stream
A narrow belt of high-altitude fast-blowing winds in the upper troposphere that influences Indian weather patterns.
Important Formulas
Board Exam Info
This chapter carries around 6 to 8 marks in the Odisha (BSE) Class 9 Social Science annual examination. Common question types include short-answer questions on the factors affecting India's climate, map-pointing questions related to the direction of the monsoon winds and rainfall distribution, and distinguishing between weather and climate or advancing and retreating monsoons.
Frequently Asked Questions
Weather refers to day-to-day atmospheric conditions of a particular place, whereas climate refers to the average weather condition of a large area calculated over a long period of 30 years or more.
Why is the monsoon considered a unifying bond in India?
The monsoon winds provide rhythmic cycles of seasons and water supply that agricultural activities across the entire country depend upon, uniting diverse landscapes and people under a single weather system.
What causes the onset of the monsoon in India?
Intense heating of the Indian subcontinent during summer creates a low-pressure area over the interior, attracting moisture-laden south-east trade winds from the southern hemisphere across the equator.
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