Low and look like puffy cotton balls



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CLOUD CLASSIFICATION – Dichotomous Key

(Your classification is complete when you are told to WRITE.)

  1. Does the sky contain clouds? If yes…go to #2

If no…WRITE “no clouds”


  1. Are the clouds low and look like puffy cotton balls? Is the weather calm?

If yes…WRITE “cumulus clouds”

If no…..Go to #3




  1. Are the clouds low and cover the sky like a light gray blanket? Bad weather could be on the way. This can also be called fog & be near to the ground.

If yes….WRITE “stratus clouds”

If no…..Go to #4




  1. Are the clouds low with puffy layers? Are they rolling (moving) and/or cover all of the sky. The color can be light or dark If yes….WRITE “stratocumulus clouds”

If no…..Go to #5


  1. Are the clouds low and dark gray? It could be raining or the clouds hide the sun If yes…WRITE “nimbostratus clouds”

If no…..Go to #6


  1. Are the clouds low, large clouds that are tall like a tower? There could be a thunderstorm. If yes….WRITE “cumulonimbus clouds”

If no……Go to #7


  1. Are the clouds in the middle of the sky with white or grayish colors? Do the clouds look like puffy cotton balls with space in between? If yes…WRITE “altocumulus clouds”

If no…..Go to #8


  1. Are the clouds in the middle of the sky and light gray? These clouds could cover the entire sky at once. If yes….WRITE “altostratus clouds”

If no……Go to #9


  1. Are the clouds high and feathery? If yes….WRITE “cirrus clouds”

If no…….Go to #10


  1. Are the clouds high, thin, light gray or white? You may be able to see the sun or moon through them. If yes…WRITE “cirrostratus clouds

If no……Go to #11


  1. Are the clouds high, puffy with spaces between them that look like waves?

If yes…..WRITE “cirrocumulus clouds”
First Try NAME_______________________

CORE_________
CLOUD OBSERVATIONS/CLASSIFICATION

Directions: Make 5 different cloud observations on different days. Classify each observation using the dichotomous key to the left. Fill in the table below after each observation.

Date

Observation Notes

low, high, puffy, flat, gray, white, tall, feathery, solid layer

Cloud Name

(Classification)

1.







2.







3.







4.







5.







*Information taken from the GLOBE Cloud Chart and from the cloud chart at



http://www.pnr-rpn.ec.gc.ca/air/cloudchart/aj00s15.en.html.


Second Try NAME_______________________

CORE_________
CLOUD OBSERVATIONS/CLASSIFICATION

Directions: Make 5 different cloud observations on different days. Classify each observation using the dichotomous key to the left. Fill in the table below after each observation.

Date

Observation Notes

low, high, puffy, flat, gray, white, tall, feathery, solid layer

Cloud Name

(Classification)

1.







2.







3.







4.







5.







*Information taken from the GLOBE Cloud Chart and from the cloud chart at



http://www.pnr-rpn.ec.gc.ca/air/cloudchart/aj00s15.en.html.


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