In this video, Sir Issac Newton explains how he discovered gravity when an apple fell from a tree and (as legend has it) hit him on the head. He outlines how he used scientific method and process to think about gravity, questioning why things fall straight down, not sideways or upwards. He talks about how he carried out his own observations, as well as discussing his famous book on the subject. Teacher notes: As a starter to introduce a practical science activity, you could write a simple quiz to encourage students to capture the keywords shown in the video. Students can write their own definitions from these words using the internet or science dictionaries to improve their scientific vocabularies. To consolidate their knowledge, you could get students to make booklets that include key information about the work of Sir Issac Newton. They could define the keywords featured in the video and find five or more additional pieces of information about the work of the scientist using books, encyclopedias or the internet.