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Question generated: The Sun appears to move across the sky each day, rising in the east and setting in the west. What causes this apparent motion?

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Question generated: Census data show that the human population doubled from 2.65 billion in 1953 to 5.3 billion in 1990. If it continues to double at this rate, the human population could reach 10 billion by the year 2020. Which best explains how this rate of human growth can harm the environment on which humans depend?

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Question generated: Plate movement can form different features on Earth. The movement of tectonic plates can be both a constructive and a destructive force. At which type of plate boundary is new crust formed?

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Question generated:
Which of the following statements best explains why stars appear to move across Earth's sky each night?