Forces & Motion
	Push/Pull, Speed, Acceleration: -Pushes and pulls can have different strengths (K-4) -Pushes and pulls cause motion and changes in motion (K-4) -An object in motion, not subjected to a force will continue to move at a constant speed in a straight line (5-8) -Many forces can act on an object causing changes in motion (5-8) -Objects in the solar system are in regular and predictable motion (5-8) -Gravity is the force that keeps objects in orbits around the sun and the rest of the motion in the solar system. (5-8) -Gravitation is a universal force that each mass exerts on any other mass and can be calculated (9-12) -The magnitude of the change in motion of an object can be calculated using the relationship F=ma (9-12)