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2
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Nation - a country
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3
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Permanently - lasting for a very long time or forever
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4
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Compartment - a space or area that is often used to hold a specific thing
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5
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Laboratory - a room with special equipment for doing scientific experiments
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6
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Orbit - the curved path that a moon or satellite follows as it goes around a planet
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7
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Gravity - the force that causes things to fall towards the Earth
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1
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International - involving two or more countries
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