The rate of change of pressure per unit distance is known as
Change of pressure
Decrease in pressure
Gradient of pressure
Variation in pressure
The pressure ___________ at the rate of 1 millibar (mb) per an altitude of 10 meters.
decreases
increases
None
Which of the following affects atmospheric pressure?
Altitude
Temperature
Earth rotation
All the above
Which of the following are examples of periodic winds?
Gusts
Windstorm
Westerly winds
Monsoons, land and sea breeze, mountain and valley breeze
What are roaring forties, furious fifties and shrieking sixties?
Oceanic storms
Westerlies in Southern Hemisphere
Westerlies in Northern Hemisphere
Pacific Ocean currents
Which instrument is used to measure atmospheric pressure?
Wind vane
Thermometer
Barometer
Hygrometer
Mercury is often used in barometer because____________________?
it is the best liquid
the height of barometer will be less
its vapour pressure is so low that it may be neglected
it moves easily
The horizontal movement of air is called
Wind
Stream
Air mass
Pressure belt
What are periodic winds?
Winds that do not change their direction periodically with the change in season
Winds that change their direction periodically with the change in season
Trade winds
The speed of wind will be _________ over ocean surfaces and plains as the friction is __________.
high , less
less , high
decrease , increase
