Air pressure and wind system
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Transcript of Air pressure and wind system
DONE BY: TEAM LAVA GIRLS
Air Pressure &
Wind System
New wordsNew Words
atmosphere –the envelope of air which surrounds the earth. air pressure -The pressure exerted by the atmosphere
Gravity- the force which attract the body towards the centre of
the earth. Electrons – negative charge
particle which move around the earth.
Monsoon winds –seasonal winds that bring rain below
from sea to land during summer and vice versa during
winterThunderstorm- serve storms
accompanied by high speed wind,lighthinig and thunder.
× cyclone- a weather conditition with the formation
of vey low pressure system surrounded by high wind speed
system revolving around it .× tornado storms having very high wind speed ,looking like a
twisted funnel formed suddenly on land .
• Latitude it is a distance measured from north of an
equator or south of equator to imaginary centre line of
earth.• longitude it is distance of
place measured east or west or prime meridian (0)that
passes through (green which near London) from centre of
earth
wind
The horizontal movement of air is known as wind. it is caused by horizontal difference in atmospheric
pressure. water flows from higher to lower level air flows from area of higher pressure to the area of
lower pressure
measurement of wind directions
the direction of wind can be absorbed with the help of wind
vane which is commonly known as weather cock .
measurement of wind speed
the speed of wind is usually measured with an instrument called anemometer .cup anemometer
are mainly used by metrological station .it consists of 3-4 metals or plastic cups on arms that spins around a vertical pole . in nature the air around us below slowly
or hardly . these changes have great effect on our weather pattern.
BREEZES
Sea breeze
During the day ,while cooler air blows in from the sea to take it
place .this is called as sea breeze.
SEA BREEZE
Sea breeze
LAND BREEZE
At night land cools rapidly .the air convection
currents is reversed. this is known as land
breeze.
Land breeze
Monsoon wind’s
The word monsoon has been derived from the Hindi word “mausum”Which means season.
during summer ,the landmasses, especially in Asia become extremely hot .this is because as the mass of
Indian subcontinent gets heated of zone of low pressure develops over it .
Storms
The winds that can rise a lot of dust ,uproot huge Blow away the roof of house and cause a large scale destructions to life and property .such strong wind
are known as storms .
as cooler air is dense there is practically no mixing and the movement along the front of the two air mass
is like it was a movement along solid surface .As huge mass of air rises a vacuum like situation is created and cooler air gushes in at high speed .this is
form of storm
What causes storm ?
Thunderstorm are severe local forms accompanied by lighting and thunder. They occur mostly in tropical
areas .E.G India
thunderstorm
Thunder storm have potential to develop into a cyclone .the huge amount of heat taken out of the atmosphere as a result of changing water vapor into water droplets at higher altitude .the cycle is repeated several times leading to the whether condition is called as cyclone.
cyclone
Destruction in floods
A tornado is a violent rotating column of air extending from a thunderstorm to the ground. They can destroy
large buildings, uproot trees and hurl vehicles hundreds of yards. They can also drive straw into
trees. Damage paths can be in excess of one mile wide to 50 miles long. In an average year, 1000 tornadoes
are reported nationwide.
tornadoes
What is atmosphere ?
answer : The envelope of air
which surrounds the planet earth
is known as atmosphere .
What is anemometers ?
Anemometer is a device used to measure wind
What is wind vane?
Wind vane is used to measure the direction of the wind commonly it is known as weather cock.
what is gravity ?Who discovered gravity ?
gravity is a force which attract our body towards ground. ISAC
NEWTON is a scientist who discovered gravity .
What is sea breeze ?
During the day ,while cooler air blows in from the sea to take it
place .this is called as sea breeze.
What is land breeze ?
At night land cools rapidly .the air convection currents is reversed.
this is known as land breeze.
What is air pressure?
Pressure at any time on earth due to weights is known as pressure
What are monsoon winds?
Seasonal winds that bring rain from sea to land during summer
and winter.
What are storms thunderstorm cyclones tornadoes ect called ?
they are known as Natural disaster
