NCERT Class 11 Geography — Chapter 3: Atmospheric circulation and Weather systems

mcqeasy

In meteorology, the process known as ‘frontogenesis’ refers to which of the following?

Official previous-year question

Verified 1 Aug 2026.

Options

AThe mixing of two air masses.
BThe lifting of warm air over cold air.
CThe formation of fronts.
DThe dissipation of a front.

Did you get this right?

Solution

The correct option is The formation of fronts..

Explanation

In meteorology, fronts are transition zones between two air masses of different densities (usually due to temperature and humidity differences). The lifecycle of a front involves its creation, intensification, and eventual decay.

Detailed Analysis:

Frontogenesis: This term refers to the process of the formation or intensification of a front. It occurs when two distinct air masses converge, leading to a steepening of the temperature gradient across the boundary. This process is a prerequisite for the development of temperate cyclones (extratropical cyclones).
Frontolysis: This refers to the opposite process, which is the dissipation or weakening of a front. This happens when the air masses mix or move away from each other, causing the temperature contrast to disappear.
Lifting of warm air: While the lifting of warm air over cold air is a mechanism that occurs at a front (frontal lifting), it describes the vertical movement associated with the front rather than the process of the front's formation itself.

Key Takeaway:

Frontogenesis is the creation or regeneration of a front, whereas Frontolysis is the dissipation or dying out of a front.

Your note

More from Chapter 3: Atmospheric circulation and Weather systems

With reference to Land and Sea Breezes, consider the following statements: 1. During the day, the pressure gradient is from the land to the sea. 2. During the night, the land loses heat faster than the sea. 3. Sea breeze blows from the sea to the land during the day. Which of the statements given above is/are correct?

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In the context of global climatic phenomena, which of the following is the most likely impact of a strong El Niño event?

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Tropical cyclones which cross 20° N latitude generally:

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With reference to atmospheric pressure, consider the following statements: 1. The vertical pressure gradient force is much smaller than the horizontal pressure gradient force. 2. We do not experience strong upward winds because the vertical pressure gradient is balanced by the gravitational force. 3. Atmospheric pressure at any elevation varies from place to place, which is the primary cause of air motion. Which of the statements given above is/are correct?

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Consider the following statements regarding the horizontal distribution of pressure: 1. Low-pressure systems are enclosed by one or more isobars with the lowest pressure in the center. 2. High-pressure systems are enclosed by isobars with the lowest pressure in the center. 3. Isobars are lines connecting places having equal pressure reduced to sea level. Which of the statements given above are correct?

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The correct option is The formation of fronts..

Explanation

Detailed Analysis:

Frontogenesis: This term refers to the process of the formation or intensification of a front. It occurs when two distinct air masses converge, leading to a steepening of the temperature gradient across the boundary. This process is a prerequisite for the development of temperate cyclones (extratropical cyclones).
Frontolysis: This refers to the opposite process, which is the dissipation or weakening of a front. This happens when the air masses mix or move away from each other, causing the temperature contrast to disappear.
Lifting of warm air: While the lifting of warm air over cold air is a mechanism that occurs at a front (frontal lifting), it describes the vertical movement associated with the front rather than the process of the front's formation itself.

Key Takeaway:

Frontogenesis is the creation or regeneration of a front, whereas Frontolysis is the dissipation or dying out of a front.