This comprehensive study guide covers the main terms and concepts needed for an earth science unit on dark matter. Review questions are included at the bottom of the study guide.

A continuation of Beyond the Earth Part I. As part of a unit on the solar system, learners will choose a component of the solar system to research. Students may use a variety of resources such as the Internet, books, and reference...

Middle schoolers learn how engineers navigate satellites in orbit around the Earth and on their way to other planets in the solar system. In accompanying activities, they explore how ground-based tracking and onboard measurements are...