Oregon Museum of Science and Industry

Learners measure a bottle full of air, and then use a vacuum pump to remove the air. When they re-weigh the bottle, learners find the mass is about 0.8g less.

Learners gain an intuitive knowledge of the physical aspects of watersheds by creating their own watershed models.

This game depicts a woman going through her day, faced with various loud sounds.

This display shows the dangers of acid rain on buildings and other structures as two concrete bunny rabbits are disintegrated by sulfuric acid. Learners scrape chalk onto the concrete bunnies.

Learners add two dyes to mineral oil and water, and then compare their miscibility (how well they mix) in each.

This quiz lets you estimate your annual radiation exposure.

Learners mix a solution of luminol with hydrogen peroxide to produce a reaction that gives off blue light.

Learners use a commercially available toy to experiment with density. They fill a chamber in the toy submarine with baking powder and release it into a tank of water.

In this activity (on page 2 of PDF), learners create a low-tech refrigerator that requires no electricity to keep food from spoiling.

In this activity, learners create a mixture of water, alcohol and permanent marker ink, and then add salt to form a colored alcohol layer on top of a colorless water layer.