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Worksheet: Atmospheric Circulation and Weather Systems | Geography Class 11 - Humanities/Arts PDF Download

Fill in the Blanks

Q1: Air expands when heated and gets compressed when __________.

Q2: The weight of a column of air from mean sea level to the top of the atmosphere is called __________.

Q3: Atmospheric pressure is measured in units of __________.

Q4: Isobars are lines connecting places having equal __________.

Q5: Near the equator, the sea-level pressure is known as __________.

Q6: The force exerted by the rotation of the earth is called __________.

Q7: The Coriolis force deflects the wind to the right direction in the __________ hemisphere.

Q8: The low pressure gets filled instead of intensifying near the __________.

Q9: The general circulation of the atmosphere sets in motion the ocean water circulation which influences the __________.

Q10: The phenomenon of southern oscillation and El Nino is known as __________.

Assertion and Reason Based

Q1: Assertion: Atmospheric pressure decreases rapidly with height in the lower atmosphere.
Reason: The decrease in pressure with height is caused by the increasing concentration of water vapor.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Both assertion and reason are false.

Q2: Assertion: The Coriolis force is maximum at the equator.
Reason: The Coriolis force is directly proportional to the angle of latitude.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Both assertion and reason are false.

Q3: Assertion: The general circulation of the atmosphere is influenced by the distribution of continents and oceans.
Reason: Oceans provide input of energy and water vapor into the atmosphere.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Both assertion and reason are false.

Q4: Assertion: El Nino is associated with the appearance of cool water off the coast of Peru.
Reason: El Nino is caused by the southern oscillation.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Both assertion and reason are false.

Q5: Assertion: Subtropical highs are located between 30° N and 30° S.
Reason: These high-pressure areas are associated with sinking air and clear skies.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Both assertion and reason are false.

Very Short Answer Type Questions

Q1: Define atmospheric pressure.

Q2: What is the primary cause of air motion (wind)?

Q3: Explain the concept of isobars.

Q4: Differentiate between a low-pressure system and a high-pressure system.

Q5: What is the Coriolis force, and in which direction does it deflect wind in the northern hemisphere?

Q6: Why are tropical cyclones not formed near the equator?

Q7: Define geostrophic wind.

Q8: What is a cyclonic circulation?

Q9: What are the three cells that set the pattern for the general circulation of the atmosphere?

Q10: What is ENSO, and how does it affect weather patterns?

Short Answer Type Questions

Q1: Explain how variations in atmospheric pressure cause the movement of air and the formation of wind.

Q2: Describe the vertical variation of pressure in the atmosphere and its significance.

Q3: How is atmospheric pressure measured, and why does it decrease with height?

Q4: Discuss the forces affecting the velocity and direction of wind, including the Coriolis force.

Q5: Explain the concept of Hadley cells and their role in the general circulation of the atmosphere.

Q6: Describe the general atmospheric circulation and its influence on the oceans.

Q7: What is El Nino, and how is it related to the southern oscillation? How does it impact weather patterns?

Q8: How do the interactions between the atmosphere and oceans affect long-range weather forecasting?

Long Answer Type Questions

Q1: Discuss the role of atmospheric pressure in weather systems, including its impact on the formation of clouds and precipitation.

Q2: Explain the concept of general atmospheric circulation and how it influences the Earth's climate and weather patterns.

Q3: Describe the complex interactions between El Nino, the southern oscillation, and their global effects on weather and climate.

Q4: How do large-scale wind patterns in the atmosphere influence ocean currents and the transfer of heat energy across the Earth's surface?

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