What is the lifetime of a typical sunspot?
A) two months
B) an hour
C) 11 years
D) from a few years to a few decades
Correct Answer:
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A) region surrounding Earth,
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A) is spherical.
B) is mostly within
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A) the flow of
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Q93: Sunspots appear dark because they
A) are coronal
Q94: How does the number of sunspots on
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