1.a. The position of an object can be described by locating it relative to another object or the background.||CA Science||Grade 2||01. Physical Sciences||1. The motion of objects can be observed and measured.|||1.b. An object’s motion can be described by recording the change in its position over time.||CA Science||Grade 2||01. Physical Sciences||1. The motion of objects can be observed and measured.|||1.c. The way to change how something is moving is to give it a push or a pull. The size of the change is related to the strength, or the amount of “force,” of the push or pull.||CA Science||Grade 2||01. Physical Sciences||1. The motion of objects can be observed and measured.|||1.e. Objects near the Earth fall to the ground unless something holds them up.||CA Science||Grade 2||01. Physical Sciences||1. The motion of objects can be observed and measured.|||2.b. When an object is subject to two or more forces at once, the effect is the cumulative effect of all the forces.||Grade 8||01. Physical Sciences||2. Forces||2. Unbalanced forces cause changes in velocity.|||2.d. How to identify separately two or more forces acting on a single static object, including gravity, elastic forces due to tension or compression in matter, and friction.||Grade 8||01. Physical Sciences||2. Forces||2. Unbalanced forces cause changes in velocity.|||1.b. When forces are balanced no acceleration occurs, and thus an object continues to move at a constant speed or stays at rest (Newton’s First Law).||Grade 9-12||01. Physics||1. Motion and Forces||1. Newton’s laws predict the motion of most objects.|||1.d. When one object exerts a force on a second object, the second object always exerts a force of equal magnitude and opposite direction. (Newton’s Third Law).||Grade 9-12||01. Physics||1. Motion and Forces||1. Newton’s laws predict the motion of most objects.|||1.g. Circular motion requires application of a constant force directed toward the center of the circle.||Grade 9-12||01. Physics||1. Motion and Forces||1. Newton’s laws predict the motion of most objects.|||1.l.* How to solve problems in circular motion, using the formula for centripetal acceleration in the following form: a=v2/r. (achievement is optional)||Grade 9-12||01. Physics||1. Motion and Forces||1. Newton’s laws predict the motion of most objects.