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In this activity (on page 2 of the PDF), learners explore surface tension by adding pennies to cups which are "full" of plain water or soapy water.

The Sacred Cenote at Chichén Itzá is a sink hole, or well, containing groundwater. In this activity, learners create their own cenote using chalk, limestone, acids, and rain water.

Learners discover that their breath contains carbon dioxide, one of the pollutants found in car exhaust.

In this hands-on botany activity, learners sprout vegetables in film canisters.

In this activity, learners explore the concept of permeability to better understand why amphibians are extremely sensitive to pollution.