https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-1/x017c12e57b64cfa8:changes-in-neigbourhood/v/reversible-and-irreversible-changes 2023-06-26T03:56:33.129173029Z Reversible and irreversible changes Some changes can be reversed, while some can't be. Let's look at examples of the same! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Reversible and irreversible changes Some changes can be reversed, while some can't be. Let's look at examples of the same! https://cdn.kastatic.org/ka-youtube-converted/Sb2bFbdG56c.mp4/Sb2bFbdG56c.mp4 125 Changes in Neigbourhood https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-1/x017c12e57b64cfa8:changes-in-neigbourhood/v/regular-and-irregular-changes 2023-06-26T03:56:33.129173029Z Regular and irregular changes Some changes happen after a definite period while some can happen at any point in time. Let's look at examples for the same! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Regular and irregular changes Some changes happen after a definite period while some can happen at any point in time. Let's look at examples for the same! https://cdn.kastatic.org/ka-youtube-converted/CUkzffnYhPw.mp4/CUkzffnYhPw.mp4 72 Changes in Neigbourhood https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-1/x017c12e57b64cfa8:changes-in-neigbourhood/v/controlled-and-uncontrolled-changes 2023-06-26T03:56:33.129173029Z Controlled and uncontrolled changes Some changes can be controlled by us while some can't. Let's look at some examples of the same! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Controlled and uncontrolled changes Some changes can be controlled by us while some can't. Let's look at some examples of the same! https://cdn.kastatic.org/ka-youtube-converted/S3smy9p2iXk.mp4/S3smy9p2iXk.mp4 72 Changes in Neigbourhood https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-1/x017c12e57b64cfa8:changes-in-neigbourhood/e/rapid-and-slow-changes 2026-04-09T13:10:38.304888012Z Types of changes LO1: Types of changes - Fast and slow changes - Physical and chemical changes - Natural and artificial changes/ Controlled and Uncontrolled changes - Reversible and irreversible changes/ Regular and irregular changes.  Revathi exercise https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-1/x017c12e57b64cfa8:changes-in-neigbourhood/e/differentiate-between-physical-and-chemical-changes 2026-04-08T00:54:09.631945657Z Differentiate between physical and chemical changes LO2: Physical and chemical changes Revathi exercise https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-1/x017c12e57b64cfa8:changes-in-neigbourhood/e/energy-required-during-changes 2026-02-26T09:10:46.921543588Z Energy required during changes Let's see how energy is involved in different types of changes. Revathi exercise