Class 9 Social Science - BIHAR
Climate
The Class 9 Social Science chapter 'Climate' for Bihar Board (BSEB) students explores the atmospheric conditions of India over a long period of time. It covers the difference between weather and climate, the vital role of the Indian monsoon system, and the factors affecting India's climate such as latitude, altitude, pressure, and winds. Students will learn about the advancing and retreating monsoons, the distribution of rainfall, and how climate acts as a unifying force in Indian life. This chapter is highly important for board exams as it features frequently in both objective and short-answer questions.
Start Learning FreeKey Concepts
Weather vs. Climate
Weather refers to the state of the atmosphere over an area at any point in time, while climate refers to the sum total of weather conditions and variations over a large area for a long period of time (more than 30 years).
The Monsoon
Monsoon refers to the seasonal reversal in the wind direction during a year, which brings heavy rainfall to the Indian subcontinent and is crucial for agriculture.
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 winds in the troposphere revolving above 12,000 meters whose speed varies from 110 km/h in summer to 184 km/h in winter.
El Niño
A warm ocean current that temporarily replaces the cold Peruvian current, leading to a warming of the tropical Pacific ocean and affecting the Indian monsoon negatively.
Important Formulas
Board Exam Info
In the Bihar (BSEB) Class 9 Social Science examinations, geography chapters like Climate generally carry around 6 to 8 marks. Questions usually include multiple-choice questions (MCQs), short answer questions defining terms like 'Monsoon' or 'Jet Stream', and long answer questions explaining the mechanism of the Indian monsoon.
Frequently Asked Questions
What is the difference between weather and climate?
Weather changes day to day and is short-term, whereas climate is the long-term pattern of weather observed over 30 years or more in a specific region.
Why is the monsoon considered a unifying bond in India?
The rhythm of seasons and the arrival of monsoon winds provide a rhythmic agricultural cycle across the country, uniting the diverse landscape of India in a shared experience of water and life.
What factors affect India's climate?
The main factors are latitude, altitude, pressure and wind system, distance from the sea (continentality), ocean currents, and relief features.
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