The motion of objects can be observed, measured, and changed. As a basis for understanding this concept, students:
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Observe and describe that the way to make something move (faster or slower or in a different direction) is by giving it a push or a pull, which is called a force.
Explain that the greater the applied force, the greater the change in the motion of the object.
Demonstrate and observe that magnets supply a force that can be used to make some things move without touching them.
Recognize and demonstrate how things near Earth fall to the ground unless something holds them up (i.e., they are subject to the force of gravity).