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teacher key

By Cindy Murphy,2014-03-07 17:10
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Key for Student Worksheet for Living in Space - Designing a Space Station 1. What are the four basic requirements to make a space station habitable? A space station needs air, water, food and power. A toilet also comes in handy. 2. What do astronauts bring into space to breathe? Why is this the best choice? The best choice is a nitrogen-oxygen mix (79% nitrogen, 21% oxyge..
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