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In this environmental science lesson, learners will examine the dangers of mercury and how humans contribute to growing mercury emissions on Earth.

This is an activity (located on page 3 of the PDF under Water Clean-up Activity) about the use of reduction agents to decontaminate ground water.

In this simulation, learners use M&M™ candy to explore radioactive isotope decay.

In this online interactive simulation, learners will add different salts to water and then watch the salts dissolve and achieve a dynamic equilibrium with solid precipitate.

This activity investigates how bark beetles can threaten forests by having learners estimate the number of infected trees from a photo.

In this activity, learners create an electrical circuit and investigate how some dissolved substances conduct electricity.

In this activity (on page 1), learners role play as atoms to explore how atoms can be rearranged to make different materials.

In this online interactive simulation, learners will test the pH of liquids like coffee, spit, and soap to determine whether each is acidic, basic, or neutral.

This experiment allows learners to experience a small scale "epidemic," demonstrating the ease with which disease organisms are spread, and enables learners to determine the originator of the "epidemi

This hands-on experiment will provide learners with an understanding of the issues that surround environmental cleanup.

In this (edible) activity, learners balance chemical equations using different kinds and colors of candy that represent different atoms. Learners will work in pairs and explore conservation of atoms.

This online interactive has three activities in the NanoLab (press the upper right button): Build, Zoom, and Transform.

In this activity (page 12), learners apply the concepts of pixilation and pointillism to the world of biomedical science.

A group of learners simulates the spread of disease by trading slips of paper, one set of which has been treated with a baking soda solution.