https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:teacher-resources/x2613d8165d88df5e:hands-on-chemistry-activities/a/introduction-to-hands-on-science-activities 2026-05-27T00:30:47.947689174Z Introduction to hands-on science activities Make science come alive in your classroom with Khan Academy's free hands-on activities. article https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:atomic-models-and-periodicity/x2613d8165d88df5e:activity-what-makes-a-neon-sign-glow/a/activity-what-makes-a-neon-sign-glow 2026-01-14T23:20:41.344464701Z Activity: What makes a neon sign glow? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:chemical-reactions/x2613d8165d88df5e:activity-how-can-a-big-log-turn-into-a-tiny-pile-of-ash-when-it-burns/a/activity-how-can-a-big-log-turn-into-a-tiny-pile-of-ash-when-it-burns 2026-01-14T23:20:41.344464701Z Activity: How can a big log turn into a tiny pile of ash when it burns? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:reaction-rates-and-equilibrium/x2613d8165d88df5e:activity-why-does-food-in-a-refrigerator-stay-fresh-for-longer/a/activity-why-does-food-in-a-refrigerator-stay-fresh-for-longer 2026-01-14T23:20:41.344464701Z Activity: Why does food in a refrigerator stay fresh for longer? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article https://www.khanacademy.org/science/teacher-resources-ngss-science-domain/x2811526c37de0eab:hands-on-science-activities/x2811526c37de0eab:high-school-physics-activities/a/activity-how-do-engineers-design-strong-bridges 2026-01-08T01:22:42.243748488Z Activity: How do engineers design strong bridges? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article https://www.khanacademy.org/science/teacher-resources-ngss-science-domain/x2811526c37de0eab:hands-on-science-activities/x2811526c37de0eab:high-school-physics-activities/a/activity-how-do-engineers-design-safety-cushions-to-save-lives 2026-01-26T00:30:32.82909804Z Activity: How do engineers design safety cushions to save lives? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:energy-work-and-power/x0e04e0cb682fb793:conservation-fo-energy/a/activity-how-do-engineers-design-roller-coasters 2026-01-26T00:30:32.82909804Z Activity: How do engineers design roller coasters? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article https://www.khanacademy.org/science/teacher-resources-ngss-science-domain/x2811526c37de0eab:hands-on-science-activities/x2811526c37de0eab:high-school-physics-activities/a/activity-why-do-optical-discs-reflect-rainbow-colors 2026-01-08T00:49:44.500630731Z Activity: Why do optical discs reflect rainbow colors? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article https://www.khanacademy.org/science/teacher-resources-ngss-science-domain/x2811526c37de0eab:hands-on-science-activities/x2811526c37de0eab:high-school-physics-activities/a/activity-how-can-motion-produce-electricity 2026-01-26T00:30:32.82909804Z Activity: How can motion produce electricity? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:nuclear-chemistry-hs/x2613d8165d88df5e:activity-how-do-we-know-when-dinosaurs-lived-on-earth/a/activity-how-do-we-know-when-dinosaurs-lived-on-earth 2026-01-14T23:20:41.344464701Z Activity: How do we know when dinosaurs lived on Earth? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article https://www.khanacademy.org/science/teacher-resources-ngss-science-domain/x2811526c37de0eab:hands-on-science-activities/x2811526c37de0eab:high-school-physics-activities/a/activity-how-do-carbon-dioxide-and-albedo-affect-how-earth-interacts-with-sunlight 2026-01-26T00:30:32.82909804Z Activity: How do carbon dioxide and albedo affect how Earth interacts with sunlight? Make science come alive in your classroom with this free hands-on activity aligned to high school standards. article