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In this activity, learners use plastic water bottles, wood, and water to build an inexpensive and portable tool to demonstrate one atmosphere of pressure at sea level.

Water on Earth is in lakes, the ocean, rivers, underground, and frozen glaciers.

In this activity, learners conduct an experiment to investigate the effect of elevated levels on CO2 on plant growth.

In this activity, learners simulate Otto von Guericke's famous Magdeburg Hemispheres experiment.