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Question generated: If 10 grams of water are added to 5 grams of salt, how much salt water will be made?

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Question generated: For his science project, Alan began a study of sugar maple trees. He noticed many differences among the sugar maple trees near his school. Which of the following three characteristics would vary the LEAST?

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Question generated: Which layer of Earth is the source of lava that erupts from volcanoes?

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In the 17th century, Galileo proposed a hypothesis to explain how suction pumps work. Galileo's hypothesis was disproved, but later it helped Torricelli in the development of an instrument for measuring atmospheric pressure. How did Galileo's hypothesis most likely help with the development of this new technology?