Cloud ud Forma matio tion Cloud droplets are made of LIQU QUID - - PowerPoint PPT Presentation

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Cloud ud Forma matio tion Cloud droplets are made of LIQU QUID - - PowerPoint PPT Presentation

Cloud ud Forma matio tion Cloud droplets are made of LIQU QUID ID water droplets and / or ice crystals in order for clouds to form you need 1. moisture (water vapor) 2. cooling (to dew point) 3. particles ~ condensation


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Cloud ud Forma matio tion

  • Cloud droplets are made of LIQU

QUID ID water droplets and / or ice crystals

  • in order for clouds to form you need

– 1. moisture (water vapor) – 2. cooling (to dew point) – 3. particles ~ condensation nuclei (smoke, dust, etc)

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SLIDE 2

Cloud types (classified by height and appearance) E-activity: Types of Clouds Face in the cloud uds (websi

bsite) e)

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SLIDE 3

3 m main in types es of clouds uds

class ssified d accordi cording ng to shape pe and height

  • Cumulus

lus – puffy with flat bottom – form when warm air rises – can result in showers – may develop into cumulonimbus clouds (CB)= T-storm

  • Cirrus

rus – thin, wispy, feathery, white clouds – form at top of troposphere (so… they are icy)

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SLIDE 4

3 m main in types es of clouds uds

  • Stratus

atus – form in smooth, flat layers – blanket a large area of the sky (usually gray) – called nimbostratus if precipitating (long periods

  • f drizzle or snow)

– called fog if formed at/near the ground

  • Other

r Cloud uds – Nimbo ~ means producing precipitation – Alto ~ means middle altitudes – Contrails ~ made by airplanes’ exhaust

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SLIDE 5
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SLIDE 6

Websites ites

  • a. Types of clouds (with pictures)
  • b. Cloud pictures:
  • c. More cloud pictures (as time permits):
  • d. Cloud matching game --if time permits:
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SLIDE 7

Precipit cipitat ation ion

  • 5 types of precipitation

– Rain/drizzle – Snow – Sleet (also called ice pellets) – Hail – Freezing rain/freezing drizzle

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SLIDE 8

RAIN

  • Water droplets fall

from the sky (clouds)

  • Droplets vary in size,

speed depends on the wind

  • Washes dirt and other

particles out of the air

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SLIDE 9

SNOW

  • water vapor

changes directly to a solid (Deposition

  • n)
  • SNOW was

NEVER rain

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SLIDE 10

HAIL

  • balls of ice that fall from

thunderstorms

  • each trip up and down is

a layer

  • hail forming (animated website)
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SLIDE 11
  • Sleet/ice

e pellets ts forms when rain falls through a thick layer of freezing air

  • Freezing

ng rain rain freezes right when it hits a layer of ice VERY dangerou rous

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SLIDE 12

Measuring Precipitation

  • rain gauge
  • ruler for snow
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SLIDE 13

Did you know…

  • About 78% of all precipitation falls over Earth’s
  • ceans (WHY?). Of the 22% that falls on land,

about 65% returns to the air by evaporation.

  • The largest hailstone ever recorded fell in

Bangladesh in 1986. It weighed over 1 kg.

  • *Arica, Chile has an average rainfall of less than 1

mm a year (.76 mm)

  • Kauai, Hawaii has average rainfall of 12 meters a

year (keep in mind that (Atl tlan anta ta gets ts an average age of 1.3 meter ters s per year) r).

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Funny??

  • What is a king’s favorite kind
  • f precipitation?

...............HAIL

  • What do you get when you

cross a snowman with a vampire? ...........Frostb tbite te

  • What do you call it when it

rains chickens and ducks? ....... Foul weather

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SLIDE 15

Websites

  • Weather

r Maker simula lati tion

  • n
  • Cloud Tutorial PowerPt (about 10 min: needs sound)

if time permits

  • Weather Eye Simulation (optional)