Science

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

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Which state saw the first self-sustaining nuclear chain reaction in 1942?
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Which of the following is produced by meiosis?
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What is the sun mostly made up of?
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12.36 Microseconds is the equivalent to one unit of what?
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What part of a plant obtains food and water from the soil and provides support?
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What type of cell doesn't have membrane around its nuclear material?
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What is the potential energy in the nucleus of an atom called?
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Which of these is a type of wetland?
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