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?

The correct option is 1 and 3 only. Explanation The horizontal distribution of atmospheric pressure is represented on weather maps using isobars. These patterns help identify pressure systems such as depressions (low pressure) and anticyclones (high pressure). - Statement 1 is Correct: A low-pressure system is characterized by closed isobars where the atmospheric pressure decreases towards the center. Consequently, the lowest pressure is located at the center of the system. - Statement 2 is Incorrect: A high-pressure system is characterized by closed isobars where the atmospheric pressure increases towards the center. Therefore, the highest pressure is found at the center, not the lowest. - Statement 3 is Correct: Isobars are imaginary lines on a map connecting points of equal atmospheric pressure. To ensure that pressure differences reflect meteorological conditions rather than altitude differences, pressure readings are standardized by reducing them to mean sea level. Key Takeaway: Isobars connect points of equal sea-level pressure. In a low-pressure system, the center holds the minimum pressure, while in a high-pressure system, the center holds the maximum pressure.

Consider the following statements regarding the horizontal… - NCERT Class 11 Geography MCQ

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

mcqeasy

Consider the following statements regarding the horizontal distribution of pressure:

Low-pressure systems are enclosed by one or more isobars with the lowest pressure in the center.
High-pressure systems are enclosed by isobars with the lowest pressure in the center.
Isobars are lines connecting places having equal pressure reduced to sea level.

Which of the statements given above are correct?

NCERT textbook question

From NCERT Fundamentals of Physical Geography · Page 2

Options

A1 and 2 only
B1 and 3 only
C1, 2 and 3
D2 only

Did you get this right?

Solution

The correct option is 1 and 3 only.

Explanation

The horizontal distribution of atmospheric pressure is represented on weather maps using isobars. These patterns help identify pressure systems such as depressions (low pressure) and anticyclones (high pressure).

Statement 1 is Correct: A low-pressure system is characterized by closed isobars where the atmospheric pressure decreases towards the center. Consequently, the lowest pressure is located at the center of the system.
Statement 2 is Incorrect: A high-pressure system is characterized by closed isobars where the atmospheric pressure increases towards the center. Therefore, the highest pressure is found at the center, not the lowest.
Statement 3 is Correct: Isobars are imaginary lines on a map connecting points of equal atmospheric pressure. To ensure that pressure differences reflect meteorological conditions rather than altitude differences, pressure readings are standardized by reducing them to mean sea level.

Key Takeaway: Isobars connect points of equal sea-level pressure. In a low-pressure system, the center holds the minimum pressure, while in a high-pressure system, the center holds the maximum pressure.

Your note

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