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Develop a model to describe that matter is made of particles too small to be seen.
Support an argument that the gravitational force exerted by Earth on objects is directed down.
Conduct an investigation and evaluate the experimental design to provide evidence that fields exist between objects exerting forces on each other even though the objects are not in contact.
Construct, use, and present arguments to support the claim that when the motion energy of an object changes, energy is transferred to or from the object.
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