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In this activity, learners explore how objects can have positive, negative, or neutral charges, which attract, repel and move between objects.

In this activity, learners explore the relationship between electric charges and magnetic fields.

In this activity, learners determine the shape of an unseen object by bouncing a ball off the object.

In this activity, learners use two different techniques to estimate how many little things fit into one bigger thing.

Using indirect observational methods, learners distinguish between charged and uncharged objects.