Students will investigate the action-reaction principal (Newton's third law of motion) by creating a water-propelled engine. By observing the device in action and changing certain variables, students will explore the properties of engines and the dynamics behind directionality and thrust. Materials Student data sheet – Download | View on Google Docs 3-4 empty aluminum soft drink cans per team, with pull tabs intact Carpenter nails of different sizes Pair of heavy work gloves for each team Strin