Jonathan read more about gravity, which was defined as a force which pulls things down. We learned that you could use force to move things left and right, and up in the air, but everything will eventually fall down. due to gravitational pull. We watched a video explaining and demonstrating this concept. It also introduced Jonathan to the physicist who discovered gravity when an apple fell on his head. Sir Isaac Newton publicized his Theory of Universal Gravitation in the 1680s, which set forth the idea that gravity is a predictable force that acts on all objects, or matter, in the universe. Jonathan answered questions in his Daily Science Student Practice Book to finish off the physical science section on force and motion.