Energy - The capacity for doing work., Force - The push or pull on an object with mass that causes it to change its velocity, Friction - The resistance of motion when one object rubs against another, Gravity - A force that attracts a body towards the center of the earth, Motion - the act or process of moving or changing place or position, Speed - A measurement of how fast an object moves relative to a reference point, Work - The measure of energy transfer that occurs when an object is moved over a distance by an external force, Inertia - the resistance an object has to change in its state of motion, Magnets - Objects which can attract some metals , Velocity - Speed in a given direction, Acceleration - The rate of change of velocity, Magnetic Field - An invisible force or field that flows from north to south, Mass - A measurement of how much matter in an object, Matter - Anything that has mass and volume (takes up space), Weight - A measure of the force of gravity pulling down on an object, Gravitational Force - A force that attracts any two objects with mass, Newton's 1st law - An object at rest or moving at a constant speed in a straight line, it will remain at rest or moving unless acted upon by an unbalanced force, Newton's 3rd law - For every action, there is an equal and opposite reaction, Law of Conservation of Energy - Energy cannot be created or destroyed, it can only be changed from one form to another, Sir Isaac Newton - The scientist responsible for discovering gravity and the laws of motion,

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