Weather and Climate

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Weather and Climate

• Part 1 Day 2
• Clouds and Weather
• Lets start off with Clouds _at_ BrainPop

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Weather and Climate

• Stratus Clouds
• Flat layered clouds that spread like a blanket
  across the sky.
• Cumulus Clouds
• White, puffy clouds that appear to rise from flat
  bases.
• Cirrus Clouds
• Look like wispy streaks or feathers.

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Weather and Climate

• Think about cleaning your room.
• Are you the type who rushes and puts everything
  in piles, or do you slowly put everything back in
  its place all over the room?
• Which style of room cleaning would be like a
  Cumulus Cloud, and which one would be like a
  Stratus Cloud?

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Weather and Climate

• Fog
• A stratus-like cloud that develops at ground
  level.
• Nimbus
• A cloud that usually brings rain will have
  nimbus, meaning rain, in it's name.

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Weather and Climate

• Rain
• Water droplets in clouds combine and become large
  and heavy enough to fall.
• Sleet
• Raindrops freeze as they fall through a layer of
  cold air.

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Weather and Climate

• Hail
• Frozen raindrops become coated with water, which
  then freezes This process then repeats.
• Snow
• Water vapor condenses as ice crystals, not water
  droplets.

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Weather and Climate

• Thunderstorms
• Occur when hot, humid air rises very quickly and
  cools.
• Bonus
• Thunderstorms are
• - The most common type of severe weather
• - Thunderstorms are associated with dark
  Cumulonimbus clouds.
• Thunderstorms _at_ BrainPop

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Weather and Climate

• Lightning
• A bright, powerful flash of light caused by
  moving electric charges.
• How Lightning Strikes
• When the negative charge in the cloud becomes
  great enough, it seeks an easy path to the
  positively charged ground below. The negative
  charge sends out a feeler, called a stepped
  leader, which is a series of invisible steps of
  negative charges.
• LiveScience.com

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Weather and Climate

• Thunder
• Thunder is the sound of air rapidly expanding
  because of the huge and sudden temperature change
  from lightning.
• The air around a lightning bolt is superheated
  to about 54,000 degrees Fahrenheit (five times
  hotter than the sun!). This sudden heating causes
  the air to expand faster than the speed of sound,
  which compresses the air and forms a shock wave
  we hear it as thunder.
• LiveScience.com

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Weather and Climate

• Thunderstorms often occur in the summer, when
  very warm air over the hot land rises quickly
  into much cooler air.

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Weather and Climate

• Tornado
• A violent, spinning funnel of air that extends
  from the bottom of a thundercloud to the ground.
• Tornadoes _at_ BrainPop

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Weather and Climate

• Hurricane
• A huge, powerful storm that produces extremely
  strong winds and heavy rain over a large area.
• It begins when a large body of air with very low
  pressure forms over tropical ocean water.
• The low-pressure area gains moisture and energy
  from the warm ocean waters.
• Winds increase in speed and being to blow in a
  circular pattern creating a tropical storm.
• When the winds reach 119kph the storm is
  classified as a hurricane.
• Hurricanes _at_ BrainPop