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Question generated: In the atomic model that includes a nucleus, the positive charge is

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Question generated: A short plant with a thick, fleshy stem, extensive roots, and a short blooming period would most likely be found in which of the following environments?

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Question generated: A scientist wanting to document a change in a river's flow pattern should observe a river over a period of

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Nonrenewable sources of energy have limited supplies. Researchers are developing devices that will make renewable energy more available. Which is a source of renewable energy?