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Chapter 8 Winds, Storms and Cyclones

  • Moving air is called wind.
  • Pressure may be defined as the force that a gas or liquid exert when contained inside something.
  • Air exert pressure.
  • As the pressure of air is low, the wind speed is increased whereas if the air pressure is higher than the wind speed decreases.
  • Air moves from the region where the pressure of air is high to the region
  • Air expands in size and occupies more space on heating.
  • The region closer to the equator get maximum heat from run.
  • Wind blow from the North and the South towards the land.
  • A thunderstorm is arises from the heavy rainfall along with the rising air create lightening and sound.
  • A condition of weather in which high speed wind revolving around a low pressure is called cyclone.
  • The center part of a cyclone is called as the eye of the cyclone.
  • A device which is used to measure the speed of wind is called anemometer.
  • The flash of light in the sky that is produced by electricity moving between clouds or from clouds to the ground.
  • Hurricane is a tropical cyclone with winds of 75 miles or greatly that is usually accompanied by rain, thunder and by lightening.
  • A violent storm with a column of rapidly rotating winds having the appearance of dark funnel shaped clouds that reaches from the sky to the ground is called as Tornado.
  • A type of storm system having circular and spiral violent winds called as Typhoon. It eventually occur in western Pacific Ocean.

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Exercise 1 ( Page No. : 93 )

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