Consider the following statements regarding the formation of an Oasis: 1. It is formed when wind blows away the sands creating a depression. 2. It occurs only where rainwater accumulates in man-made tanks. 3. These areas are generally fertile and support settled life. Which of the statements given above is/are correct?

Correct Option The correct option is (c). Explanation An oasis is a fertile area in a desert or semi-desert environment where water is available. Its formation is primarily driven by the erosional activity of wind, known as deflation, interacting with the underground water table. Statement-wise Analysis - Statement 1 is Correct: Strong winds in deserts lift and carry away sand particles, a process called deflation. When this continuous erosion creates a depression deep enough to reach the underground water table, groundwater seeps to the surface to form an oasis. - Statement 2 is Incorrect: An oasis is a natural landform caused by the exposure of groundwater or natural springs. It is not limited to or defined by rainwater accumulation in man-made tanks. The use of the word "only" makes the statement factually wrong. - Statement 3 is Correct: Because of the perennial availability of water, oases are fertile and support vegetation such as date palms, maize, and other crops. This fertility allows for settled life and permanent habitation in arid regions. Key Takeaway Oases are formed when wind deflation creates depressions that expose the water table, providing a natural water source that supports fertility and human settlement in deserts.

Consider the following statements regarding the formation of an Oasis: 1. It is… - NCERT Class 7 Geography MCQ

NCERT Class 7 Geography — Chapter 2: Life in the Deserts

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Consider the following statements regarding the formation of an Oasis:

It is formed when wind blows away the sands creating a depression.
It occurs only where rainwater accumulates in man-made tanks.
These areas are generally fertile and support settled life.

Which of the statements given above is/are correct?

NCERT textbook question

From NCERT The Earth Our Habitat · Page 3

Options

A1 and 2 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (c).

Explanation

An oasis is a fertile area in a desert or semi-desert environment where water is available. Its formation is primarily driven by the erosional activity of wind, known as deflation, interacting with the underground water table.

Statement-wise Analysis

Statement 1 is Correct: Strong winds in deserts lift and carry away sand particles, a process called deflation. When this continuous erosion creates a depression deep enough to reach the underground water table, groundwater seeps to the surface to form an oasis.
Statement 2 is Incorrect: An oasis is a natural landform caused by the exposure of groundwater or natural springs. It is not limited to or defined by rainwater accumulation in man-made tanks. The use of the word "only" makes the statement factually wrong.
Statement 3 is Correct: Because of the perennial availability of water, oases are fertile and support vegetation such as date palms, maize, and other crops. This fertility allows for settled life and permanent habitation in arid regions.

Key Takeaway

Oases are formed when wind deflation creates depressions that expose the water table, providing a natural water source that supports fertility and human settlement in deserts.

Your note

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