The slideshow below will be used to teach students about the history of manned space exploration and to launch inquiry about what modifications are necessary for people to survive outside of Earth's atmosphere. Students have already seen astronauts in their spacesuits but have given little thought as to why these suits are necessary, nor to the difficulties that arose in sending men into space in the first place.
This will be a natural "launching pad" to discussion about terraforming other planets for human use (perhaps Mars) in the distant future.
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