Kaltura Share to Google Classroom Dr. Crouch and Jennifer compare gravity at the Earth's surface to that at the International Space Station using ratios and percent. Grades: 6 7 8 9 10 11 12 Subjects: MathRatios and ProportionsScienceEarth ScienceSpace Science Collection: Career Explorations!Science, Technology, Engineering, and Mathematics | Career Explorations Series: NASA OnlineNASA CONNECT Math Simulations