Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: Want to explore more? Check out the full middle school playlist here: Elements are the fundamental building blocks of all matter, just as letters form the basis of all writing. With only about 100 natural elements, nature constructs everything around us—from tiny microbes to vast oceans and stars. These elements, represented by symbols on the periodic table, combine in countless ways to create the diverse materials that make up the universe. 00:00 Intro 01:00 Elements in water, rocks, & living things 01:56 Periodic table & symbols 04:16 Summary Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects,…
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