In a mountain/valley wind system, mountain breezes occur:
a. during nighttime
b. during daytime.
c. whenever there is significant cloud cover.
d. None of these choices.
a
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In 1887, Ralph Abercromby and Hugo Hildebrandsson expanded Howard’s original cloud classification system and published a classification system that, with only slight modification, is still in use today. In their system, ____ principal cloud forms are divided into ____ primary cloud groups
a. ?eight; two b. ?nine; three c. ?ten; four d. ?eleven; five e. ?twelve; six
Why are phytoplankton critical for marine life?
a. They are large contribution to marine food webs b. They generate massive amounts of atmospheric oxygen c. They are able to bind billions of tons of carbon into carbohydrates d. All of these choices
What is the name of the large scale geologic process that drives the rock cycle?
What will be an ideal response?
What is the 2015 population of Oceania?
A) 25 million B) 30 million C) 40 million D) 55 million E) 60 million