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 Types of changes 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 Types of changes https://www.khanacademy.org/science/mh-class-7-science-revision-course/x16e69e7a3344a1ee:week-3/x16e69e7a3344a1ee:untitled-320/v/slow-and-fast-changes 2024-04-06T07:44:39.644882865Z Slow and fast changes Some changes are slow and some are fast. Let's look at some examples for each of them! Vibhor Pandey video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Slow and fast changes Some changes are slow and some are fast. Let's look at some examples for each of them! https://cdn.kastatic.org/ka-youtube-converted/olDfJyEQtOA.mp4/olDfJyEQtOA.mp4 247 Types of changes 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/karnataka-bridge-course-class-7th-science/x23f4b0ee108f5758:changes-around-us/x23f4b0ee108f5758:types-of-changes/e/energy-is-required-for-a-change 2025-02-13T13:42:33.753834602Z Energy is required for a change Let's solve some questions on energy requirement for changes Vibhor Pandey exercise