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Lesson 7 Unit 3

TermDefinition
frigid extremely cold
greenhouse a building with a transparent glass or plastic roof and walls made to trap in heat from the sun and grow plants all year round
NASA an acronym for the National Aeronautics and Space Administration: an organization in the United States that directs space travel and research
polar related to the pole of a planet or the area surrounding it
naked eye with just your eyes, without the use of instruments
probe a tool used to explore something, such as outer space
 



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