7TH GRADE CHAPTER 16 UNDERSTANDING THE WEATHER

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7TH GRADECHAPTER 16 UNDERSTANDING THE WEATHER
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CLOUDS

• A CLOUD IS A COLLECTION OF MILLIONS OF TINY WATER
  DROPLETS OR ICE CRYSTALS.
• CLOUDS FORM AS WARM AIR RISES AND COOLS.

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TYPES OF CLOUDS

• CUMULUS CLOUDS PUFFY, WHITE CLOUDS, FLAT
  BOTTOMS.
• FORM WHEN WARM AIR RISES.
• FAIR WEATHER.

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TYPES OF CLOUDS

• CUMULONIMBUS CLOUD IS A CUMULUS CLOUD THAT
  PRODUCES THUNDERSTORMS.
• WHEN NIMBUS OR
• NIMBO- IS PART OF A CLOUDS NAME THAT MEANS THAT
  PERCIPITATION WILL FALL FROM THE CLOUD.

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TYPES OF CLOUDS

• STRATUS CLOUDS CLOUDS THAT FORM IN LAYERS.
• COVER LARGE AREAS OF THE SKY, OFTEN BLOCKING OUT
  THE SUN.
• CAUSED BY A GENTLE LIFTING OF A LARGE BODY OF
  AIR.

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TYPES OF CLOUDS

• NIBOSTRATUS CLOUDS DARK STRATUS CLOUDS THAT
  USUALLY PRODUCE LIGHT TO HEAVY, CONTINUOUS RAINS.
• WHEN WATER VAPOR CONDENSES NEAR THE GROUND, IT
  FORMS A STRATUS CLOUD CALLED FOG.

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TYPES OF CLOUDS

• CIRRUS CLOUDS THIN, FEATHERY WHITE CLOUDS FOUND
  AT HIGH ALTITUDES.
• FORM WHEN THE WIND IS STRONG.
• INDICATE THAT BAD WEATHER IS APPROACHING.

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TYPES OF CLOUDS

• LOW CLOUDS MADE UP OF WTAER DROPLETS. PREFIX
  STRATO-
• MIDDLE CLOUDS MADE UP OF BOTH WATER DROPLETS
  AND ICE CRYSTALS. THE PREFIX ALTO-
• HIGH CLOUDS MADE UP OF ICE CRYSTALS. THE
  PREFIX CIRRO-

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PERCIPITATION

• PERCIPIATION IS WATER, IN SOLID OR LIQUID FORM,
  THAT FALLS FROM THE AIR TO THE EARTH.
• RAIN LIQUID, FALLS FROM CLOUDS.
• SNOW WATER VAPOR FREEZES
• SLEET RAIN FALLS THOURGH A LAYER OF FREEZING
  AIR.

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PERCIPITATION

• FRONT AIR MASSES WITH DIFFERENT
  CHARACTERISITCS, SUCH AS TEMPERATURE AND
  HUMIDITY, DO NOT USUALLY MIX.
• WEATHER AT A FRONT IS USUALLY CLOUDY AND STORMY.

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SECTION 2

• AIR MASS LARGE BODY OF AIR THAT HAS SIMILAR
  TEMPERATURE AND MOISTURE THOURGHOUT.

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AIR MASSES

• MARITIME (M) FORMS OVER WATERWET
• CONTINENTAL (C) FORMS OVER LANDDRY
• POLAR (P) FORMS OVER THE POLAR REGIONSCOLD
• TROPICAL (T) DEVELOPS OVER THE TROPICSWARM

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COLD FRONT

• COLD AIR MASS MEETS AND DISPLACES A WARM AIR
  MASS.
• MOVE FAST
• PRODUCE THUNDERSTORMS
• HEAVY RAIN OR SNOW
• COOLER WEATHER FOLLOWS

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WARM FRONT

• A WARM AIR MASS MEETS AND OVERRIDES A COLD AIR
  MASS.
• DRIZZLY PRECIPITATION
• CLEAR AND WARM CONDITIONS FOLLOW

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OCCLUDED FRONT

• FASTER-MOVING COLD AIR MASS OVERTAKES A
  SLOWER-MOVING WARM AIR MASS AND FORCES THE WARM
  AIR UP.
• COOL TEMPERATURES
• LARGE AMOUNTS OF PRECIPITATION

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STATIONARY FRONTS

• COLD AIR MASS MEETS A WARM AIR MASS AND LITTLE
  HORIZONTAL MOVEMENT OCCURS.
• DRIZZLY PRECIPITATION
• CLEAR AND WARM