https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:water/x0c8b40bd4b242f0b:physical-and-chemical-properties-of-water/v/does-ice-float-in-water 2023-06-26T04:10:39.513125705Z Does ice float in water? Let's see if the ice cubes in a glass sink or float, when we pour some water into it! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Does ice float in water? Let's see if the ice cubes in a glass sink or float, when we pour some water into it! https://cdn.kastatic.org/ka-youtube-converted/RGPgT0Q13sM.mp4/RGPgT0Q13sM.mp4 118 Water https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:water/x0c8b40bd4b242f0b:physical-and-chemical-properties-of-water/e/water-as-a-solvent 2026-04-08T01:15:04.085520103Z Properties of water Let's solve some problems to better understand water as a solvent. Aakash Bagga exercise https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:water/x0c8b40bd4b242f0b:water-as-a-good-solvent/v/temperature-increases-the-solubility-of-water 2023-06-26T04:10:39.513125705Z Temperature increases the solubility of water Some salt can be dissolved in water at a certain temperature of water. But can more or less be dissolved if we change the temperature of water? Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Temperature increases the solubility of water Some salt can be dissolved in water at a certain temperature of water. But can more or less be dissolved if we change the temperature of water? https://cdn.kastatic.org/ka-youtube-converted/cCPSFdaXIvY.mp4/cCPSFdaXIvY.mp4 237 Water https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:water/x0c8b40bd4b242f0b:hardness-and-softness-of-water/v/purifying-water-by-distillation 2023-06-26T04:10:39.513125705Z Purifying water by distillation How can we purify salt water solution? Let's say we want to obtain pure water form the solution, how do we do that? Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Purifying water by distillation How can we purify salt water solution? Let's say we want to obtain pure water form the solution, how do we do that? https://cdn.kastatic.org/ka-youtube-converted/I1Jxc7ZU1-A.mp4/I1Jxc7ZU1-A.mp4 168 Water https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:water/x0c8b40bd4b242f0b:hardness-and-softness-of-water/e/hardness-of-water 2025-07-26T11:05:28.872294968Z Hardness of water Let's look at the various ways by which hardness of water can be removed. Revathi exercise