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Question generated: A student wraps a wire around an iron nail. The student then connects the wire to a battery. The nail attracts another nail and they stick together. What force holds the two nails together?

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Question generated: A student crumples up a sheet of paper. Which property of the paper has changed?

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Question generated: Which of the following helps keep the Moon in its orbit?

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Question generated:
Which best explains why some reptiles and amphibians lay an abundance of eggs?