https://www.khanacademy.org/science/physics/discoveries/electrostatics/v/foil-leaf-electroscope 2021-02-07T17:14:00Z Foil leaf electroscope Foil Leaf Electroscope. Aluminum leaves repel in the presence of a charged object Brit Cruise video https://cdn.kastatic.org/googleusercontent/y92ng0rSbWekx12-tGueW0dru6XdL0eTkYXgILbnh2PwGeT2BKXsTAQ7guToPU5hibHZrTOELbk6hiWIJqitWhyZ3Q Foil leaf electroscope Foil Leaf Electroscope. Aluminum leaves repel in the presence of a charged object https://cdn.kastatic.org/ka-youtube-converted/Evo0sf5FztI.mp4/Evo0sf5FztI.mp4 52 Some natural phenomena https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:electricity/x0c8b40bd4b242f0b:lightning-and-lightning-conductors/v/atmospheric-electric-charge 2025-01-08T02:29:38.725066879Z Atmospheric Electric Charge Explore the science of lightning! Learn about lightning within clouds, between clouds, and cloud-to-ground strikes. Discover how lightning conductors work with an engaging animation in this educational video. Joel Prakash Stephen video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Atmospheric Electric Charge Explore the science of lightning! Learn about lightning within clouds, between clouds, and cloud-to-ground strikes. Discover how lightning conductors work with an engaging animation in this educational video. https://cdn.kastatic.org/ka-youtube-converted/LXEXJwqh1dg.mp4/LXEXJwqh1dg.mp4 450 Some natural phenomena https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:some-natural-phenomena/x17f7017799a605d2:earthquake/e/earthquake 2026-04-08T00:54:09.631945657Z Earthquake This exercise on Earthquakes for Class 8 Science (Chapter 15: Some Natural Phenomena) covers definition, causes, effects, seismic zones in India, Richter scale, prediction myths, safety measures, and quake-resistant structures.It helps students understand earthquakes scientifically and learn how to stay safe. Yajurva Joshi exercise https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:electricity/x0c8b40bd4b242f0b:lightning-and-lightning-conductors/e/lightning 2026-04-07T23:36:17.218592739Z Atmospheric electric charge Let's practice! Aakash Bagga exercise https://www.khanacademy.org/science/uk-science-class-7-new/x2afa7396c019dcda:winds-storms-and-cyclones/x2afa7396c019dcda:untitled-197/v/severestorms 2025-07-01T18:08:15.179962416Z Severe storms We might prefer beautiful weather reports, but we really pay attention when severe storms are predicted. So how do Earth's most powerful storms develop, and how is this related to cloud formation? NOVA video https://cdn.kastatic.org/googleusercontent/XmyIMmxX3-ws3FZf79K8o-ChUtwO8RRUIVfp4oL-uR4KfM3sX0kuJpVgV7QGWsZZkDVUgiO5f3WzGpB_E1ShrPcs Severe storms We might prefer beautiful weather reports, but we really pay attention when severe storms are predicted. So how do Earth's most powerful storms develop, and how is this related to cloud formation? https://cdn.kastatic.org/ka-youtube-converted/xJ-bPlF6PNc.mp4/xJ-bPlF6PNc.mp4 218 Some natural phenomena https://www.khanacademy.org/science/revision-term-1-ka-science-class-7/x05832cca8e86a1ef:week-3/x05832cca8e86a1ef:winds-storms-and-cyclones/e/staying-safe-during-storms 2026-04-08T00:16:02.937952483Z Staying Safe during Storms Learn how to stay safe when nature roars. Bitasta Datta exercise