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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.

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

In this activity, learners take measurements and create charts to learn about the size of dinosaurs and their relative scale to humans.

Learners compare a life-size drawing of a Tyrannosaurus rex head and a full-size Sinornithosaurus body to understand that dinosaurs varied in size.

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

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.

In this activity, learners explore the engineering behind seismographs and how technology has improved accurate recording of earthquakes.