https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:matter-in-our-surroundings/x46dd29ce84a663ea:states-of-matter/v/states-of-matter-in 2025-08-06T20:09:57.016070308Z States of matter (Bonus video) How many states of matter exist? How do they differ? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw States of matter (Bonus video) How many states of matter exist? How do they differ? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/QkiULYmCO3g.mp4/QkiULYmCO3g.mp4 735 Particle model of matter https://www.khanacademy.org/science/bridge-course-class-11th-chemistry/x426c9d2c554669cb:states-of-matter/x426c9d2c554669cb:properties-of-matter/v/characteristics-of-particles-of-matter 2023-06-26T12:36:08.867767149Z Characteristics of particles of matter How are you able to smell a perfume sprayed in the corner of a room or Why does the level of water not rise when we mix salt in it? Let's answer these questions and more in this video! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Characteristics of particles of matter How are you able to smell a perfume sprayed in the corner of a room or Why does the level of water not rise when we mix salt in it? Let's answer these questions and more in this video! https://cdn.kastatic.org/ka-youtube-converted/axxD_eWk7M0.mp4/axxD_eWk7M0.mp4 328 Particle model of matter https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:matter-in-our-surroundings/x46dd29ce84a663ea:states-of-matter/v/effect-of-temp-and-pressure-on-state-change 2023-06-26T12:36:08.867767149Z Effect of temp and pressure on state change Can matter change its state upon changing the temperature and pressure? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Effect of temp and pressure on state change Can matter change its state upon changing the temperature and pressure? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/gx0vGzZfuOQ.mp4/gx0vGzZfuOQ.mp4 321 Particle model of matter https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:kinetic-particle-model-of-matter/x0e04e0cb682fb793:particle-model-of-matter/e/characteristics-of-particles-of-matter 2026-07-02T04:40:35.242673419Z Characteristics of particles of matter Let's solve some questions! Vibhor Pandey exercise https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:intermolecular-forces-and-properties/x2eef969c74e0d802:solids-liquids-and-gases/v/representing-solids-liquids-and-gases-using-particulate-models 2022-10-05T02:43:18.611402953Z Representing solids, liquids, and gases using particulate models In this video, we'll learn how to represent solids, liquids, and gases using particulate models. The particles in a solid are either highly ordered (if the solid is crystalline) or have no regular arrangement (if the solid is amorphous). In both cases, the motion of the particles is limited. The particles in a liquid are close together and are constantly moving and colliding. Finally, the particles in a gas are generally well-separated and are in constant, random motion. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/4afb6fa0-d848-4ae6-8e3f-41ea2c33569a_1280_720_base.png Representing solids, liquids, and gases using particulate models In this video, we'll learn how to represent solids, liquids, and gases using particulate models. The particles in a solid are either highly ordered (if the solid is crystalline) or have no regular arrangement (if the solid is amorphous). In both cases, the motion of the particles is limited. The particles in a liquid are close together and are constantly moving and colliding. Finally, the particles in a gas are generally well-separated and are in constant, random motion. https://cdn.kastatic.org/ka-youtube-converted/4Q45iIeMdCM.mp4/4Q45iIeMdCM.mp4 291 Particle model of matter https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-3/x00110b31861f2508:a-journey-through-states-of-water/v/changing-states-of-matter-part-1 2025-01-08T02:31:40.424345982Z Changing States of Matter : Part 1 Learn how solids, liquids, and gases transform through processes like melting, freezing, evaporation, condensation, and sublimation. Using engaging examples and clear explanations, we’ll explore how temperature and pressure play a key role in these changes. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Changing States of Matter : Part 1 Learn how solids, liquids, and gases transform through processes like melting, freezing, evaporation, condensation, and sublimation. Using engaging examples and clear explanations, we’ll explore how temperature and pressure play a key role in these changes. https://cdn.kastatic.org/ka-youtube-converted/KrR3VPGt6BY.mp4/KrR3VPGt6BY.mp4 413 Particle model of matter https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-3/x00110b31861f2508:a-journey-through-states-of-water/v/changing-states-of-matter-part-2 2025-01-14T13:46:46.197485586Z Changing States of Matter : Part 2 Discover the fascinating world of matter and its changing states in this fun and easy-to-understand video for middle schoolers! Learn how solids, liquids, and gases transform through processes like melting, freezing, evaporation, condensation, and sublimation. Using engaging examples and clear explanations, we’ll explore how temperature and pressure play a key role in these changes. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Changing States of Matter : Part 2 Discover the fascinating world of matter and its changing states in this fun and easy-to-understand video for middle schoolers! Learn how solids, liquids, and gases transform through processes like melting, freezing, evaporation, condensation, and sublimation. Using engaging examples and clear explanations, we’ll explore how temperature and pressure play a key role in these changes. https://cdn.kastatic.org/ka-youtube-converted/4kT_dN1rVhI.mp4/4kT_dN1rVhI.mp4 361 Particle model of matter https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:thermal-properties-of-matter/x0e04e0cb682fb793:relationsgip-between-motion-of-particles-and-temperature/e/change-of-state 2026-06-15T04:30:38.969568377Z Change of state Let's do some questions! vibhor exercise https://www.khanacademy.org/science/bridge-course-class-11th-chemistry/x426c9d2c554669cb:states-of-matter/x426c9d2c554669cb:properties-of-matter/e/the-states-of-matter 2026-04-21T09:50:34.424034119Z The states of matter. Let's solve a few problems to identify the different states of matter and their properties. Aanchal Arora exercise https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:chemistry-of-the-environment/x8bc8fb44369617ed:water/e/melting-and-boiling-point 2026-05-04T10:20:49.891577728Z Melting and Boiling point Let's solve some questions on melting and boiling point Vibhor Pandey exercise