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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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F.A.S.T F.A.S.T
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7 years ago
Sunspot activity:
A) typically has the same number of sunspots per year.
B) typically varies in number on a roughly eleven-year cycle.
C) was first observed in the late nineteenth century.
D) has been conclusively linked to climate changes.
Textbook 
Understanding Weather and Climate

Understanding Weather and Climate


Edition: 5th
Authors:
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nathanIOnathanIO
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7 years ago
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F.A.S.T Author
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7 years ago
Whatt!!! This is awesome
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7 years ago
I\'m so SMART Wink Face
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