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In this activity, learners observe as soap bubbles float on a cushion of carbon dioxide gas. Learners blow bubbles into an aquarium filled with a slab of dry ice.

In this activity (on page 8), learners model how marble statues and buildings are affected by acid rain.

In this activity, learners use gumdrops and toothpicks to model the composition and molecular structure of three greenhouse gases: carbon dioxide (CO2), water vapor (H2O) and methane (CH4).

In this activity, learners discover if carbon dioxide has an effect on temperature.

In this activity, learners imagine what the world might look like if we could build an elevator to space!

In this activity, learners explore how acids can dissolve eggshells leaving behind a membrane-covered bouncy egg.

In this environmental science activity (page 4 of the PDF), learners use vinegar and chalk to observe the effect of acid rain on various building materials and plant life.

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 will build and experiment with their own windmills made from simple household materials.

In this activity, learners build models of comets, using edible materials, to learn about comets' structure.