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Proportionality: The X-Plane Generation
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In this activity, learners build a 1:140 "scale model" of NASA's X-33 Reusable Launch Vehicle (RLV) Technology Demonstrator, and investigate how the model dimensions compare to the real vehicle.

Model the Sun and Earth
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In this activity, learners make scale models of the Sun and Earth out of paper mache.

Big Time Tour
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In this activity (on pages 16-21), learners get a sense of geological time by understanding how big a million is.

Super Soaking Materials
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In this activity, learners will test cups full of potting soil, sand, and sphagnum moss to see which earth material is able to soak up the most water.

Shake it up with Seismographs!
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In this activity, learners explore the engineering behind seismographs and how technology has improved accurate recording of earthquakes.