https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-1/x017c12e57b64cfa8:untitled-210/v/types-of-mixtures-middle-school-chemistry-khan-academy 2023-06-26T03:56:33.129173029Z Types of mixtures Mixing salt in water and sand in water gives two different types of mixtures. Let's learn what they are! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Types of mixtures Mixing salt in water and sand in water gives two different types of mixtures. Let's learn what they are! https://cdn.kastatic.org/ka-youtube-converted/gNJPKV1m_Ek.mp4/gNJPKV1m_Ek.mp4 191 Mixtures https://www.khanacademy.org/science/ap-chemistry-beta/x2eef969c74e0d802:intermolecular-forces-and-properties/x2eef969c74e0d802:solutions-and-mixtures/v/types-of-mixtures 2022-10-05T02:43:18.611402953Z Types of mixtures A mixture is composed of one or more pure substances in varying composition. There are two types of mixtures: heterogeneous and homogeneous. Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout. The most common type of homogenous mixture is a solution, which can be a solid, liquid, or gas. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/8c4a4b15-f55a-489b-893a-33e73785eb06_1280_720_base.png Types of mixtures A mixture is composed of one or more pure substances in varying composition. There are two types of mixtures: heterogeneous and homogeneous. Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout. The most common type of homogenous mixture is a solution, which can be a solid, liquid, or gas. https://cdn.kastatic.org/ka-youtube-converted/HgD6a4TVxLY.mp4/HgD6a4TVxLY.mp4 375 Mixtures https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:atoms-elements-and-compounds/x8bc8fb44369617ed:elements-compounds-and-mixtures/v/types-of-mixtures-ms 2025-01-16T17:32:17.772857468Z Types of mixtures A mixture is a physical blend of two or more substances, unlike pure substances such as elements or compounds. Homogeneous mixtures are uniform throughout, with components evenly distributed at a molecular level, while heterogeneous mixtures have visible separation between components. Physical properties like density or solubility allow separation without a chemical reaction. Examples include salt water (homogeneous) and oil and water (heterogeneous). Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/fdb448a7-a551-4497-81f5-704e5ff938e0_1280_720_base.png Types of mixtures A mixture is a physical blend of two or more substances, unlike pure substances such as elements or compounds. Homogeneous mixtures are uniform throughout, with components evenly distributed at a molecular level, while heterogeneous mixtures have visible separation between components. Physical properties like density or solubility allow separation without a chemical reaction. Examples include salt water (homogeneous) and oil and water (heterogeneous). https://cdn.kastatic.org/ka-youtube-converted/rDWfLHn8PDM.mp4/rDWfLHn8PDM.mp4 340 Mixtures https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:atoms-elements-and-compounds/x8bc8fb44369617ed:elements-compounds-and-mixtures/v/properties-of-homogeneous-mixtures 2025-01-16T17:32:17.772857468Z Properties of homogeneous mixtures Homogeneous mixtures, also known as solutions, have components that are evenly distributed at the molecular level without chemical bonding. Examples include salt water, air, and alloys like steel. Solutions consist of a solute dissolved in a solvent, and their properties can vary with concentration. Mixtures can be separated using physical properties, such as boiling points or magnetism, unlike compounds that require chemical changes to be separated. Mahesh Shenoy video https://cdn.kastatic.org/ka_thumbnails_cache/34f67b27-294c-4a5e-8834-7104aea5ada4_1280_720_base.png Properties of homogeneous mixtures Homogeneous mixtures, also known as solutions, have components that are evenly distributed at the molecular level without chemical bonding. Examples include salt water, air, and alloys like steel. Solutions consist of a solute dissolved in a solvent, and their properties can vary with concentration. Mixtures can be separated using physical properties, such as boiling points or magnetism, unlike compounds that require chemical changes to be separated. https://cdn.kastatic.org/ka-youtube-converted/oilrxnwowTs.mp4/oilrxnwowTs.mp4 363 Mixtures https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-1/x017c12e57b64cfa8:untitled-210/e/homogeneous-and-heterogeneous-mixtures 2026-04-20T08:00:34.865588968Z Types of mixtures: Homogeneous and Heterogeneous mixtures LO1: Differences between pure and impure substances.  LO2: Differentiate between homogeneous and heterogeneous mixtures.   Revathi exercise https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:solutions-suspensions-and-colloids/v/solution-suspension-and-colloid 2023-06-26T12:36:08.867767149Z Solution, Suspension and Colloid What is the difference between salt water, chalk in water and milk? They're all mixtures but how are they different? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Solution, Suspension and Colloid What is the difference between salt water, chalk in water and milk? They're all mixtures but how are they different? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/qFHYnSY1h9I.mp4/qFHYnSY1h9I.mp4 512 Mixtures https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:solutions-suspensions-and-colloids/e/differentiating-solution-suspension-and-colloids 2026-04-07T09:22:30.618598699Z Differentiating Solution, Suspension and Colloids. Let's solve a few problems to differentiate between a solution, a suspension and a colloid. Aanchal Arora exercise https://www.khanacademy.org/science/biology/water-acids-and-bases/hydrogen-bonding-in-water/a/water-as-a-solvent 2023-12-15T18:44:45.463322731Z Solvent properties of water Why water makes a good solvent, and what kinds of molecules dissolve best in it. article https://www.khanacademy.org/science/exam-preparation-class-6th/x196eb96f0f1caea0:week-3/x196eb96f0f1caea0:air/v/activity-air-is-a-mixture-of-gases 2023-06-26T03:56:33.129173029Z Activity: Air is a mixture of gases Let's see how air is a mixture of gases through this simple activity! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Activity: Air is a mixture of gases Let's see how air is a mixture of gases through this simple activity! https://cdn.kastatic.org/ka-youtube-converted/bhxOGOO4_og.mp4/bhxOGOO4_og.mp4 185 Mixtures https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-4/x017c12e57b64cfa8:untitled-257/v/explanation-air-is-a-mixture-of-gases 2023-06-26T03:56:33.129173029Z Explanation: Air is a mixture of gases Let's look at the explanation of the activity - Air is a mixture of gases! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Explanation: Air is a mixture of gases Let's look at the explanation of the activity - Air is a mixture of gases! https://cdn.kastatic.org/ka-youtube-converted/nZ0HxN2gclk.mp4/nZ0HxN2gclk.mp4 128 Mixtures https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:air/x0c8b40bd4b242f0b:composition-of-air-other-components-of-air-and-its-uses/v/air-has-water-vapor 2023-06-26T04:10:39.513125705Z Air has water vapor What happens when we leave a glass of cold water resting on a table for some time? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Air has water vapor What happens when we leave a glass of cold water resting on a table for some time? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/Kolzbyv31to.mp4/Kolzbyv31to.mp4 62 Mixtures https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:air/x0c8b40bd4b242f0b:composition-of-air-other-components-of-air-and-its-uses/e/constituents-of-air 2026-03-24T23:41:07.080866137Z Constituents of air Let's solve some problems to better understand the constituents of air. Aakash Bagga exercise https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:chemistry-of-the-environment/x8bc8fb44369617ed:air-quality-and-climate/e/properties-and-composition-of-air 2026-06-12T04:20:46.952280615Z Properties and Composition of Air LO: Properties and Composition of Air Revathi exercise https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-3/x00110b31861f2508:methods-of-separation-in-everyday-life/v/sedimentation-and-decantation 2023-06-26T03:56:33.129173029Z Sedimentation and Decantation How do we separate the large insoluble solid sand particles from water? Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Sedimentation and Decantation How do we separate the large insoluble solid sand particles from water? https://cdn.kastatic.org/ka-youtube-converted/FOOt9JvS8H8.mp4/FOOt9JvS8H8.mp4 174 Mixtures https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:experimental-design/x8bc8fb44369617ed:definitions/e/sedimentation-decantation-and-filteration 2026-07-02T04:30:41.228477938Z Sedimentation, Decantation and Filtration Lets answer some questions! Shankar R exercise https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-3/x00110b31861f2508:methods-of-separation-in-everyday-life/v/separation-technique-winnowing-middle-school-science-khan-academy 2025-01-14T13:41:30.149478976Z Separation Technique - Winnowing Join us in exploring the traditional and fascinating method of winnowing! This video delves into how wind is used to separate lighter impurities like husks, chaff, and small sticks from heavier grains such as rice and wheat. Watch as we demonstrate the use of a winnowing basket, or 'Kula', showing each step of the process—from tossing the grain mixture into the air to letting the wind carry away unwanted materials. Learn the science behind why winnowing works and its significance in food preparation across cultures Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Separation Technique - Winnowing Join us in exploring the traditional and fascinating method of winnowing! This video delves into how wind is used to separate lighter impurities like husks, chaff, and small sticks from heavier grains such as rice and wheat. Watch as we demonstrate the use of a winnowing basket, or 'Kula', showing each step of the process—from tossing the grain mixture into the air to letting the wind carry away unwanted materials. Learn the science behind why winnowing works and its significance in food preparation across cultures https://cdn.kastatic.org/ka-youtube-converted/v2skK5_JXWU.mp4/v2skK5_JXWU.mp4 187 Mixtures https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-3/x00110b31861f2508:methods-of-separation-in-everyday-life/e/type-1-definition-and-principle-of-winnowing 2026-04-15T04:20:43.780498197Z Definition and Principle of Winnowing Lets answer some questions! Shankar R exercise https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-3/x00110b31861f2508:methods-of-separation-in-everyday-life/v/separation-technique-handpicking-sieving 2025-01-14T13:41:30.149478976Z Separation Technique - Handpicking & Sieving Discover the simple yet effective methods of handpicking and sieving used to separate mixtures in our everyday lives. In this video, we explore how large, easily visible impurities like stones or husks are removed from grains through handpicking. We then delve into sieving, where smaller particles like fine sand or lumps in flour are separated using a sieve. Learn how these techniques ensure the purity of food ingredients and understand the science behind them Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Separation Technique - Handpicking & Sieving Discover the simple yet effective methods of handpicking and sieving used to separate mixtures in our everyday lives. In this video, we explore how large, easily visible impurities like stones or husks are removed from grains through handpicking. We then delve into sieving, where smaller particles like fine sand or lumps in flour are separated using a sieve. Learn how these techniques ensure the purity of food ingredients and understand the science behind them https://cdn.kastatic.org/ka-youtube-converted/-FIxZ9fNftA.mp4/-FIxZ9fNftA.mp4 332 Mixtures https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-3/x00110b31861f2508:methods-of-separation-in-everyday-life/e/handpicking-techniques 2026-04-21T09:50:34.424034119Z Handpicking Techniques Lets answer some questions! Shankar R exercise https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-3/x00110b31861f2508:methods-of-separation-in-everyday-life/v/filtration 2023-06-26T03:56:33.129173029Z Filtration How can we separate water and tiny insoluble particles in it? Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Filtration How can we separate water and tiny insoluble particles in it? https://cdn.kastatic.org/ka-youtube-converted/rv6h2tw8-2M.mp4/rv6h2tw8-2M.mp4 212 Mixtures https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/filtration-is-matter-around-us-pure 2025-07-12T10:19:31.630915517Z Filtration How can we separate undissolved solid from liquid? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Filtration How can we separate undissolved solid from liquid? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/8ev0mReTwRU.mp4/8ev0mReTwRU.mp4 164 Mixtures https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/evaporation-is-matter-around-us-pure 2025-05-17T07:42:26.597170414Z Evaporation How to separate dissolved salt from water? We don't need heavy scientific equipment. This is something you can try at home, but safely! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Evaporation How to separate dissolved salt from water? We don't need heavy scientific equipment. This is something you can try at home, but safely! https://cdn.kastatic.org/ka-youtube-converted/-h5qOLU6jWI.mp4/-h5qOLU6jWI.mp4 194 Mixtures https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/sublimation-is-matter-around-us-pure 2025-07-12T10:19:31.630915517Z Sublimation How can we separate powdered camphor from salt? Both are white and in powder form. Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Sublimation How can we separate powdered camphor from salt? Both are white and in powder form. Let's find out! https://cdn.kastatic.org/ka-youtube-converted/kt87ruvWyTc.mp4/kt87ruvWyTc.mp4 190 Mixtures https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/crystallisation 2023-06-26T12:36:08.867767149Z Crystallisation How can we separate salt from water without heating? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Crystallisation How can we separate salt from water without heating? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/hBpmLf-8G2A.mp4/hBpmLf-8G2A.mp4 188 Mixtures https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:experimental-design/x8bc8fb44369617ed:separation-and-purification/e/crystallisation 2025-02-13T13:42:33.753834602Z Crystallisation Let's solve some questions on Crystallisation Vibhor Pandey exercise https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/basics-of-chromatography 2020-06-23T07:22:41Z Basics of chromatography Understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exclusion, ion exchange, affinity, and HPLC. Angela Guerrero video https://cdn.kastatic.org/googleusercontent/89HB_p_jfEzP8gF9BpTsK4yZXlM_imxL1b-XWdPJI3KRC8VECuFeJUPMxoHke6RxPxUkfINzhUEdrmRCqJB_x7bt Basics of chromatography Understand the basic principles of different kinds of chromatography: paper, thin layer, column, size-exclusion, ion exchange, affinity, and HPLC. https://cdn.kastatic.org/ka-youtube-converted/SnbXQTTHGs4.mp4/SnbXQTTHGs4.mp4 556 Mixtures https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/simple-and-fractional-distillations 2020-06-23T07:22:40Z Simple and fractional distillations Learn how chemicals can be separated and purified through distillation, a process which separates them based on their respective boiling points. By Angela Guerrero. Angela Guerrero video https://cdn.kastatic.org/googleusercontent/k5V4BDgdD21kDfLcDnc2xY7r7Jx29TAko7autiw2VzVbtZirvyhcRO4jN0av4KbeRm2Q3MDUY1fd4a5NGdsFhLRbGw Simple and fractional distillations Learn how chemicals can be separated and purified through distillation, a process which separates them based on their respective boiling points. By Angela Guerrero. https://cdn.kastatic.org/ka-youtube-converted/3pL2X-8-eVk.mp4/3pL2X-8-eVk.mp4 570 Mixtures https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/v/separating-immiscible-liquids 2023-06-26T12:36:08.867767149Z Separating immiscible liquids How do we separate two liquids that do not mix with each other? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Separating immiscible liquids How do we separate two liquids that do not mix with each other? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/TNFNBaRyv_A.mp4/TNFNBaRyv_A.mp4 116 Mixtures https://www.khanacademy.org/science/cambridge-o-level-chemistry-cie/x8bc8fb44369617ed:experimental-design/x8bc8fb44369617ed:definitions/e/methods-of-separation-part-i 2026-07-02T05:10:42.969642541Z Methods of separation LO: Understand the various separation methods like threshing, handpicking, evaporation, condensation, filtration, sedimentation, decantation, chromatography etc. Revathi exercise https://www.khanacademy.org/science/class-9-chemistry/x46dd29ce84a663ea:is-matter-around-us-pure/x46dd29ce84a663ea:methods-to-separate-the-components-of-a-mixture/e/methods-to-separate-the-compounds-of-a-mixture 2026-04-03T18:30:01.793877038Z Methods to separate the compounds of a mixture. Let's solve a few problems to identify the methods to separate the compounds of a mixture. Aanchal Arora exercise