https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:8-2-ignition-temperature/v/requirements-of-combustion 2025-05-05T07:34:27.31685294Z Requirements of Combustion How does fire start? Why do firefighters use water to put it out? In this video, we’ll dive into the science behind ignition temperature, the fire triangle, and how fires can be controlled. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Requirements of Combustion How does fire start? Why do firefighters use water to put it out? In this video, we’ll dive into the science behind ignition temperature, the fire triangle, and how fires can be controlled. https://cdn.kastatic.org/ka-youtube-converted/w3th6WckaH0.mp4/w3th6WckaH0.mp4 369 Combustions, fuels and flame https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:8-2-ignition-temperature/e/combustion-and-requirements-for-combustion 2026-04-07T23:17:37.123726494Z Combustion and Requirements for Combustion Lets answer some questions! Shankar R exercise https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:types-of-combustion/v/types-of-combustion-part-1 2025-05-05T07:34:27.31685294Z Types of Combustion Part 1 In this video, discover the fascinating world of combustion! We explore two key types: Rapid combustion, where substances like petrol or cooking gas ignite quickly, releasing a lot of heat and light; and Spontaneous combustion, where materials like oily rags catch fire on their own without any external flame. Learn how rapid combustion powers stoves and engines, while spontaneous combustion can cause unexpected fires. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Types of Combustion Part 1 In this video, discover the fascinating world of combustion! We explore two key types: Rapid combustion, where substances like petrol or cooking gas ignite quickly, releasing a lot of heat and light; and Spontaneous combustion, where materials like oily rags catch fire on their own without any external flame. Learn how rapid combustion powers stoves and engines, while spontaneous combustion can cause unexpected fires. https://cdn.kastatic.org/ka-youtube-converted/VUdZE5jlteA.mp4/VUdZE5jlteA.mp4 342 Combustions, fuels and flame https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:types-of-combustion/v/types-of-combustion-part-2 2025-05-05T07:34:27.31685294Z Types of Combustion Part 2 In this video, dive into two fascinating types of combustion: Explosion and Slow combustion! Explosions happen when substances like gunpowder burn almost instantly, releasing massive amounts of heat, light, gas, and a loud sound — think fireworks and firecrackers! In contrast, slow combustion is a quiet, gradual process where little heat and light are released, like the slow rusting of iron or the digestion of food in our bodies. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Types of Combustion Part 2 In this video, dive into two fascinating types of combustion: Explosion and Slow combustion! Explosions happen when substances like gunpowder burn almost instantly, releasing massive amounts of heat, light, gas, and a loud sound — think fireworks and firecrackers! In contrast, slow combustion is a quiet, gradual process where little heat and light are released, like the slow rusting of iron or the digestion of food in our bodies. https://cdn.kastatic.org/ka-youtube-converted/c90al1utbuE.mp4/c90al1utbuE.mp4 229 Combustions, fuels and flame https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:types-of-combustion/e/types-of-combustion 2026-04-08T00:36:09.500768563Z Types of Combustion Lets answer some questions! Shankar R exercise https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:structure-of-flame/v/structure-of-flame 2025-06-04T05:00:54.52646514Z Structure of Flame Ever wondered what’s really happening inside a candle flame? In this video, we explore the fascinating structure of a flame and how each part plays a role in the combustion process. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Structure of Flame Ever wondered what’s really happening inside a candle flame? In this video, we explore the fascinating structure of a flame and how each part plays a role in the combustion process. https://cdn.kastatic.org/ka-youtube-converted/_quEXfQ445Q.mp4/_quEXfQ445Q.mp4 317 Combustions, fuels and flame https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:structure-of-flame/e/structure-of-flame 2026-04-08T01:15:04.085520103Z Structure of Flame Lets answer some questions Shankar R exercise https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:fuel-and-their-efficiency/v/what-is-fuel 2025-05-05T07:34:27.31685294Z What is Fuel ? What is a fuel? Why do we use different fuels for cooking, vehicles, and industries? In this video, we explore the meaning of fuel, what makes a fuel “good,” and why no fuel is truly ideal. Learn how fuels are classified into solid, liquid, and gaseous types, and understand the key features of an ideal fuel like cost-effectiveness, safety, and energy output. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw What is Fuel ? What is a fuel? Why do we use different fuels for cooking, vehicles, and industries? In this video, we explore the meaning of fuel, what makes a fuel “good,” and why no fuel is truly ideal. Learn how fuels are classified into solid, liquid, and gaseous types, and understand the key features of an ideal fuel like cost-effectiveness, safety, and energy output. https://cdn.kastatic.org/ka-youtube-converted/ONRtd65LJk4.mp4/ONRtd65LJk4.mp4 345 Combustions, fuels and flame https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:fuel-and-their-efficiency/e/fuel 2026-04-08T01:15:04.085520103Z Fuel Lets answer some questions! Shankar R exercise https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:fuel-and-their-efficiency/v/fuel-efficiency-and-calorific-values 2025-05-05T07:34:27.31685294Z Fuel Efficiency and Calorific Values Why is LPG more efficient than wood? In this video, we explore the concept of fuel efficiency and the importance of calorific value — the amount of heat produced by burning 1 kg of fuel. You’ll learn how different fuels like wood, coal, LPG, and CNG compare in terms of energy output and why cleaner, high-calorific fuels are preferred. Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Fuel Efficiency and Calorific Values Why is LPG more efficient than wood? In this video, we explore the concept of fuel efficiency and the importance of calorific value — the amount of heat produced by burning 1 kg of fuel. You’ll learn how different fuels like wood, coal, LPG, and CNG compare in terms of energy output and why cleaner, high-calorific fuels are preferred. https://cdn.kastatic.org/ka-youtube-converted/oXrcamphhQM.mp4/oXrcamphhQM.mp4 290 Combustions, fuels and flame https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:fuel-and-their-efficiency/e/fuel-efficiency-and-calorific-value 2026-04-07T23:17:37.123726494Z Fuel Efficiency and Calorific Value Lets answer some questions! Shankar R exercise https://www.khanacademy.org/science/telangana-class-8-science/x17f7017799a605d2:combustions-fuels-and-flame/x17f7017799a605d2:fuel-and-their-efficiency/v/harmful-effects-of-burning-fuel 2025-05-05T07:34:27.31685294Z Harmful effects of burning fuel What happens when fuels burn? In this video, we uncover the harmful effects of burning fuels on our health and the environment. Learn how pollutants like carbon monoxide, carbon dioxide, sulphur dioxide, and carbon particles are released, leading to problems like breathing issues, global warming, and acid rain. We also explore why clean fuels like CNG are better alternatives. Designed for middle school students, this video explains serious environmental issues in a clear, easy-to-understand way Shankar Nair video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Harmful effects of burning fuel What happens when fuels burn? In this video, we uncover the harmful effects of burning fuels on our health and the environment. Learn how pollutants like carbon monoxide, carbon dioxide, sulphur dioxide, and carbon particles are released, leading to problems like breathing issues, global warming, and acid rain. We also explore why clean fuels like CNG are better alternatives. Designed for middle school students, this video explains serious environmental issues in a clear, easy-to-understand way https://cdn.kastatic.org/ka-youtube-converted/Yz482pfa7vA.mp4/Yz482pfa7vA.mp4 319 Combustions, fuels and flame https://www.khanacademy.org/science/grade-9-chemistry-snc-aligned/x22d5b83c2ea2dc38:environmental-chemistry/x22d5b83c2ea2dc38:air-pollutants/e/harmful-effects-of-burning-fuel 2026-04-07T22:23:57.656416987Z Harmful Effects of Burning Fuel Lets answer some questions! Shankar R exercise