https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:sound/x0c8b40bd4b242f0b:origin-of-sound-vibrations/v/sound-is-produced-from-a-vibration 2023-06-26T04:10:39.513125705Z Sound is produced from a vibration What produces a sound? Let's understand that through a small activity! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Sound is produced from a vibration What produces a sound? Let's understand that through a small activity! https://cdn.kastatic.org/ka-youtube-converted/UArKngC3NGQ.mp4/UArKngC3NGQ.mp4 154 Sound https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:sound/x0c8b40bd4b242f0b:origin-of-sound-vibrations/v/sound-can-travel-in-liquids 2023-06-26T04:10:39.513125705Z Sound can travel in liquids What happens if you strike two metal spoons inside water? Do you hear them striking, or not? Let's find out! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Sound can travel in liquids What happens if you strike two metal spoons inside water? Do you hear them striking, or not? Let's find out! https://cdn.kastatic.org/ka-youtube-converted/AC5x6yGJFLo.mp4/AC5x6yGJFLo.mp4 56 Sound https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:sound/x0c8b40bd4b242f0b:origin-of-sound-vibrations/e/origin-of-sound 2026-04-07T23:17:37.123726494Z Origin of sound Let's solve some questions on origin of sound Vibhor Pandey exercise https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:sound/x0c8b40bd4b242f0b:types-of-sound-transmission-of-sound-reflection-of-sound/v/loudness-and-pitch 2024-12-29T07:21:40.948705593Z Loudness and Pitch Learn about loudness, pitch, intensity, amplitude, and their relationships, with sound samples and insights into the audible range in this fun middle school science video. Joel Prakash Stephen video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Loudness and Pitch Learn about loudness, pitch, intensity, amplitude, and their relationships, with sound samples and insights into the audible range in this fun middle school science video. https://cdn.kastatic.org/ka-youtube-converted/eA19gFOH1JA.mp4/eA19gFOH1JA.mp4 408 Sound https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:sound/x0c8b40bd4b242f0b:types-of-sound-transmission-of-sound-reflection-of-sound/e/types-of-sound-their-transmission-and-reflection 2026-04-08T01:15:04.085520103Z Types of sound, their transmission and reflection Let's solve questions on types of sound, transmission and reflection Vibhor Pandey exercise https://www.khanacademy.org/science/class-7-science/x0c8b40bd4b242f0b:sound/x0c8b40bd4b242f0b:noise-harmful-effects-and-control/e/noise 2025-07-26T09:56:05.549447741Z Noise Let's solve some questions on noise! Vibhor Pandey exercise