Science & NatureEasy
Which space agency is responsible for the majority of human spaceflight programs in the United States?
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What is the Earth's outermost layer called?
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What phenomenon is caused by the movement of tectonic plates?
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Which of the following is a mineral?
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What type of boundary occurs when two tectonic plates move away from each other?
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Which layer of the Earth's atmosphere is closest to the surface?
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