TED-Ed

View full lesson: https://ed.ted.com/lessons/if-molecules-were-people-george-zaidan-and-charles-morton When molecules collide, chemical reactions can occur -- causing major structural changes akin to getting a new arm on your face! George Zaidan and Charles Morton playfully imagine chemical systems as busy city streets, and the colliding molecules within them as your average, limb-swapping joes. Lesson by George Zaidan and Charles Morton, animation by Neighbor.