Question

What is meant by planetary winds?
A. Winds occurring on the planet throughout the year.
B. Winds occurring on the plant in seasons.
C. Winds occurring due to local variation in temperature and pressure.
D. These are the winds which blow extensively over continents and oceans.

Answer 1

Hint:
Planetary winds are a type of wind.
It is distributed throughout the lower atmosphere.
It is classified into several categories.

Complete answer:
Planetary winds are defined as those winds which are distributed in the lower portion of the atmosphere and blow regularly throughout the year in limited areas of latitudinal belts in the north-east and south-east direction or from high pressure to low pressure regions. Thus, it is the movement of winds mainly over the continents and oceans.

The winds are mainly classified into five basic types:

Planetary winds

Trade winds – They are also known as Tropical Easterlies which blow from the right in the Northern Hemisphere to the left in the Southern Hemisphere because of the Coriolis Effect and the Ferrel’s Law.

The Westerlies – They are also known as Shrieking Sixties, Furious Fifties and Roaring Forties blowing from the subtropical high pressure belts to sub polar low pressure belts.

Periodic Winds – It is defined as those winds which change the direction periodically according to change in the season.

Local Winds – They are defined as those winds which are created due to the pressure difference between the air over the land and sea regions.

Therefore, the correct answer is D

Note:
Winds are measured with the help of anemometers and wind vanes.
Winds are caused because of the uneven heating between the land and sea or uneven heating between the equator and pole.
Periodic Winds are further classified into four types, i.e. Monsoon winds, Land breeze, Sea breeze and mountain and valley breeze.