Kaltura Share to Google Classroom Information Standards Dr. Crouch and Jennifer compare gravity at the Earth's surface to that at the Moon's surface using ratios. Standards 6.RP Ratios and Proportional Relationships6.RP.3 Apply the concepts of ratios and rates to solve real-world and mathematical problems. Grades: 6 Subjects: MathRatios and ProportionsScienceEarth ScienceSpace Science Collection: Career Explorations!Science, Technology, Engineering, and MathematicsSpanish TranslationsSpanish Captions Series: NASA OnlineNASA CONNECT Math Simulations