Oregon Museum of Science and Industry

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.

In this experiment, learners will conduct chemical and physical tests to identify mystery substances.

Learners add acid rain (nitric acid) to two cups that represent lakes. One cup contains limestone gravel and the other contains granite gravel.

This activity (on pages 21-32 of PDF) has learners act out several classic brain teasers.

In this activity (on page 2), one person "programs" the other like a robot to move through a space, trying to get them to avoid obstacles and reach a goal.

In this classic memory game (on pages 37-45 of PDF), learners turn over tiles to reveal images on the back.

In this chemistry demonstration, acid rain is simulated in a petri dish.

Learners build models of sinkholes to gain an intuitive knowledge of their physical aspects.

Learners work in pairs to design, construct, and test a device that exhibits positive, neutral, and negative buoyancy. They test a number of different objects in water to see if they sink or float.

Learners pour equal amounts of coffee, mineral oil, corn syrup, and alcohol into a beaker. The liquids resolve into stacked layers, and learners can infer which liquids are the most and least dense.