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CK-12 Foundation
Revolutions of Earth: Planet Cube
Does assessing Earth Science vocabulary making your head spin? Test scholars' knowledge of revolving and rotating using an interactive tool. The movement of a new planet and its moon is in their hands, allowing them to explore...
CK-12 Foundation
Satellites, Shuttles, and Space Stations: Satellites in Orbit
Blast off! How do satellites, space shuttles, and space stations escape Earth's gravity and achieve orbit? Young astronauts study rocket science (literally) with an interactive lesson. They discover the four main uses for satellites, how...