https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/v/requirements-of-combustion 2025-05-08T18:00:12.33491354Z ଦହନ ପାଇଁ ଆବଶ୍ଯକତା 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 ଦହନ ପାଇଁ ଆବଶ୍ଯକତା 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/VH9qKL4WQho.mp4/VH9qKL4WQho.mp4 369 ଦହନ https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/e/combustion-and-requirements-for-combustion 2026-04-08T15:53:17.03241881Z ଦହନ ଏବଂ ଦହନ ପାଇଁ ଆବଶ୍ୟକତା ଆସ କିଛି ପ୍ରଶ୍ନର ଉତ୍ତର ଦେବା ! Shankar R exercise https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/v/types-of-combustion-part-1 2025-05-08T18:00:12.33491354Z ଦହନର ପ୍ରକାରଗୁଡିକ (ଭାଗ ୧) 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 ଦହନର ପ୍ରକାରଗୁଡିକ (ଭାଗ ୧) 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/Yz7xJB_cI3Q.mp4/Yz7xJB_cI3Q.mp4 342 ଦହନ https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/v/types-of-combustion-part-2 2025-05-08T18:00:12.33491354Z ଦହନର ପ୍ରକାରଗୁଡିକ (ଭାଗ ୨) 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 ଦହନର ପ୍ରକାରଗୁଡିକ (ଭାଗ ୨) 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/p_apU1sEE7M.mp4/p_apU1sEE7M.mp4 229 ଦହନ https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/e/types-of-combustion 2026-04-08T15:53:17.03241881Z ଦହନର ପ୍ରକାରଗୁଡିକ ଆସ କିଛି ପ୍ରଶ୍ନର ଉତ୍ତର ଦେବା ! Shankar R exercise https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/v/structure-of-flame 2025-06-11T03:30:31.530821825Z ଶିଖାର ଗଠନ 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 ଶିଖାର ଗଠନ 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/z7e2bRjMYFc.mp4/z7e2bRjMYFc.mp4 317 ଦହନ https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/e/structure-of-flame 2026-04-08T15:53:17.03241881Z ଶିଖାର ଗଠନ ଆସ କିଛି ପ୍ରଶ୍ନର ଉତ୍ତର ଦେବା । Shankar R exercise https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/v/what-is-fuel 2025-05-08T18:00:12.33491354Z ଇନ୍ଧନ କଣ ? 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 ଇନ୍ଧନ କଣ ? 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/tysNbvZlKwI.mp4/tysNbvZlKwI.mp4 345 ଦହନ https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/e/fuel 2026-04-08T15:53:17.03241881Z ଇନ୍ଧନ ଆସ କିଛି ପ୍ରଶ୍ନର ଉତ୍ତର ଦେବା ! Shankar R exercise https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/v/fuel-efficiency-and-calorific-values 2025-05-08T18:00:12.33491354Z ଇନ୍ଧନ ଦକ୍ଷତା ଏବଂ କ୍ୟାଲୋରୀ ମୂଲ୍ୟ 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 ଇନ୍ଧନ ଦକ୍ଷତା ଏବଂ କ୍ୟାଲୋରୀ ମୂଲ୍ୟ 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/hgnv-mhR9XU.mp4/hgnv-mhR9XU.mp4 290 ଦହନ https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/e/fuel-efficiency-and-calorific-value 2026-04-08T15:53:17.03241881Z ଇନ୍ଧନ ଦକ୍ଷତା ଏବଂ କ୍ୟାଲୋରୀ ମୂଲ୍ୟ ଆସ କିଛି ପ୍ରଶ୍ନର ଉତ୍ତର ଦେବା ! Shankar R exercise https://or.khanacademy.org/science/revision-term-1-od-science-grade-8/x5373fa20bcb5cc7b:week-2/x5373fa20bcb5cc7b:combustion/v/harmful-effects-of-burning-fuel 2025-05-08T18:00:12.33491354Z ଇନ୍ଧନ ଜଳାଇବାର କ୍ଷତିକାରକ ପ୍ରଭାବ 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 ଇନ୍ଧନ ଜଳାଇବାର କ୍ଷତିକାରକ ପ୍ରଭାବ 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/wW7VfIu6UbI.mp4/wW7VfIu6UbI.mp4 319 ଦହନ