Science

What scientist discovered that sunspots occur in an eleven-year cycle?

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What tool uses a magnetic needle that points north?
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What part of a plant obtains food and water from the soil and provides support?
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What are the huge storms that the sun produces called?
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What is the liquid component of blood known as?
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Which planet's orbit is the most circular?
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Who was the first man in space in 1961?
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Which of the following items has the most mass?
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What is the ripened ovary of a plant containing the seeds?
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