
Metric system part 2 | Science Toolkit | Khan Academy
Khan Academy, 7 min, 2.2K views, Jul 27, 2026
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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! In the English system, units for length, volume, and mass are not related. In the metric system, these units are connected. The meter is the base unit of length, the liter is the unit of volume, and the kilogram is the base unit of mass. One cubic centimeter of water equals one milliliter and has a mass of one gram, which shows how the metric system links volume and mass. ------------------ Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?utm_source=youtube&utm_medium=desc Volunteer here: https://www.khanacademy.org/contribute?utm_source=youtube&utm_medium=desc