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**Earth and space science**

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This activity is about scale and distance. Learners will use simple sports balls as scale models of Earth and the Moon. Given the astronomical distance between Earth and the Moon, students will determine the scale of the model system and the... (View More) distance that must separate the two models. This activity is in Unit 1 of the Exploring the Moon teachers guide, which is designed for use especially, but not exclusively, with the Lunar Sample Disk program. (View Less)

In this exercise, students learn about the historical development of the Julian and the Gregorian Calendars and design a reasonable calendar for an imaginary planet, considering the cycle period and making design tradeoffs, This resource is from... (View More) PUMAS - Practical Uses of Math and Science - a collection of brief examples created by scientists and engineers showing how math and science topics taught in K-12 classes have real world applications. (View Less)

This math example shows how to calculate the distance one can see from different heights using trigonometry. This resource is from PUMAS - Practical Uses of Math and Science - a collection of brief examples created by scientists and engineers... (View More) showing how math and science topics taught in K-12 classes have real world applications. (View Less)