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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.

Are balloons porous or non-porous? In this activity, learners watch an entertaining Mr. O video and conduct a simple experiment to find out.

This activity was designed for blind learners, but all types of learners can model how vibrating particles, such as in a sound wave, bump into other particles causing them to vibrate, and that the vib

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

In this activity, learners use colored candy to represent subatomic particles and make a model of an atom (Bohr model).