Multiple choice

Which of the following is correct about westerlies?

  1. The cells from which westerlies arrive are called Ferrel cells.

  2. Hadley cells are the source for westerlies.

  3. Polar cells blowing towards the middle latitudes cause the westerlies.

  4. The transfer of heat energy from lower latitudes to higher latitudes causes the westerlies.

  5. None of the above
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A Correct answer
Explanation

This is the correct answer. Westerlies are caused by Ferrel cells. In the middle latitudes the circulation is that of sinking cold air that comes from the poles and the rising warm air that blows from the subtropical high. At the surface these winds are called westerlies and the cell is known as the Ferrel cell.

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