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Period 8 group 4
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Period 8 group 4

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