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Question generated: A student pushes a wooden block across a sheet of sandpaper. Which characteristic of the block increases?

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Question generated: When a boy stands in a field in the sunlight, he usually is able to see his

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Question generated: One student wrote a report about an investigation in which fertilizer was added to tomato plants. Which information from that student's report would most help a second student repeat the investigation?

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Question generated:
Which is the best example of a pure substance?