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Learners smell balloons filled with different scents to guess what's inside. From this, they infer the presence and motion of scented molecules.

During this activity, learners will make different versions of "ooze" using varied proportions of detergent and glue.

In this activity, learners discover that there is space between molecules even in a cup "full" of water. They first fill a cup with marbles, and then add sand to fill the gaps between the marbles.

As a group, learners investigate three packages which are all the same size and shape, but have different contents. One is filled with foam, one is filled with wood, and one is filled with metal.

In two separate bags, learners mix water with Epsom salts and detergent.