The number of _______________ on the Sun varies over an 11-year cycle.
A) sunspots
B) rays
C) canals
D) valleys

Name: The number of _______________ on the Sun varies over an 11-year cycle. A) sunspots B) rays C) canals D) valleys
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The number of sunspots on the Sun varies over an 11-year cycle, known as the solar cycle. This cycle affects solar radiation and can influence space weather and climate on Earth.

The Number of _______________ on the Sun Varies Over an 11-Year