In which direction do the horns of a barchan generally point?
Answer and explanation
Correct answer: In the direction of the wind
The governing concept is the movement and shape of crescentic sand dunes. A barchan forms where wind blows predominantly from one direction and there is limited sand. Sand moves more rapidly across the thinner horns than over the thicker central body, so the horns extend downwind and point in the direction of prevailing wind movement. Thus B is correct. Sea depth and river-source direction have no role in barchan orientation.
Frequently asked questions
What is the correct answer to this question?
In the direction of the wind
Why is this the correct answer?
The governing concept is the movement and shape of crescentic sand dunes. A barchan forms where wind blows predominantly from one direction and there is limited sand. Sand moves more rapidly across the thinner horns than over the thicker central body, so the horns extend downwind and point in the direction of prevailing wind movement. Thus B is correct. Sea depth and river-source direction have no role in barchan orientation.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Recording of Transactions (I & II). Topic: Covers the accounting equation.
