Period 8 group 4

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Period 8 group 4

  1. 2. Thunderstorms <ul><li>Heavy rain falls, lightning flashes, thunder roars, and hail might fall </li></ul><ul><li>Occur in warm moist air masses and along fronts </li></ul><ul><li>When rising dense air cools, water vapor condenses into water droplets or ice crystals </li></ul><ul><li>Raindrops cool the air around the surface </li></ul>
  2. 3. Hurricanes <ul><li>The most powerful storm is the hurricane </li></ul><ul><li>A hurricane is a large, swirling, low pressure system that forms over the warm Atlantic Ocean </li></ul><ul><li>A storm must have winds of at least 119 km/h to be called a hurricane </li></ul><ul><li>When a hurricane strikes land, high winds, tornadoes, heavy rains, and high waves can cause a lot of damage </li></ul>
  3. 4. Lightning and Thunder <ul><li>The movement of the air can cause different parts of a cloud to become oppositely charged. </li></ul><ul><li>When current flows between regions of opposite electrical charge, lightning flashes. </li></ul><ul><li>Lightning can reach temperatures of about 30,000 </li></ul>

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