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A girl with long hair is going to be participating in an experiment that uses an alcohol burner for an energy source. What is the best thing for her to do to prepare for this experiment?

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A student proposes the rate of increase in a plant's mass will be proportional to the length of light exposure per day when all other variables are constant. How should this proposal be classified?

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The burning of fossil fuels has added pollutants that contain sulfur atoms to the air. These pollutants have contributed to which of the following?

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Which resource, abundant in Nevada, is nonrenewable?