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Question generated: Two identical lamps contain the same amount of different types of oil. They are allowed to burn until all the oil has been burned. Which measurement will best provide the total difference in chemical energy between the two oils?

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Question generated: Before it rains water must collect in

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Question generated: A student mixed baking soda with vinegar and observed that the reaction was endothermic. When is a reaction endothermic?

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Question generated:
After mining removes layers of rock from a hillside, new plants begin to grow in the cracks of the bare rock. The plants beginning to grow are an example of which natural process?