Abercromby’s and Hildebrandsson’s cloud classification system divides cloud forms into four primary cloud groups - ____________________ clouds, ____________________ clouds, and ____________________ clouds; the fourth group contains clouds showing more vertical than horizontal development.

Fill in the blank with correct word.


ANSWER: ?high; middle; low
high; low; middle
low; middle; high
low; high; middle
middle; low; high
middle; high; low

Environmental & Atmospheric Sciences

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