States of matter | Middle school chemistry | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/m... Want to explore more? Check out the full middle school playlist here:    • Middle school chemistry | Khan Academy   Matter exists in three main states: solids, liquids, and gases, each with unique particle arrangements and behaviors. Particles range from being tightly packed, with a definite shape and volume, to moving freely, with no fixed shape or volume. Understanding these states of matter helps us see why solids are rigid, liquids flow, and gases expand to fill spaces. 00:00 Intro 00:29 Solids and their properties 01:28 Liquids and their properties 02:40 Gases and their properties 03:43 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, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. 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://donate.khanacademy.org/give/4... Volunteer here: https://www.khanacademy.org/contribut...