A case based upon the environmental devastation of the Aral Sea that illustrates economic concepts of opportunity cost and social marginal cost.

This activity requires students to research, design, construct, and test a solar oven. Students will collect data from their own individual oven to combine with research of "real-life" solar ovens in an activity ending scientific paper.

This article provides an overview of educational resources available from polar research programs.

This video segment from Kentucky Life describes how scientists control pollination of one of the few remaining American chestnut trees to develop blight resistant trees.

This activity is a field investigation where students gather data, draw detailed diagrams, and write descriptions about living organisms and non-living things seen in a small school ground area.

Students build on their understanding and feel for flow rates, as gained from the associated Faucet Flow Rate activity, to estimate the flow rate of a local river. The objective is to be able to relate laboratory experiment results to the environment. They use the U.S. Geological Survey website (http://waterdata.usgs.gov/nwis/rt) to determine the actual flow rate data for their river, and compare their estimates to the actual flow rate. For this activity to be successful, choose a nearby river and take a field trip or show a video so students gain a visual feel for the flow of the nearby river.

The students will participate in listening and discussing the story, Under One Rock: Bugs, Slugs, and Other Ughs, by Anthony D. Fredericks and illustrated by Jennifer DiRubbio. On the following day, we will explore our nearby forest searching for some of the animals mentioned in the story. For the third day of this lesson, the students will share what they have written and drawn in their nature journals from the previous day's walk.

Learn about root systems of trees in the Congaree Swamp National Park in this video segment from NatureScene.

This video segment from Nature takes viewers to a road race in Death Valley.

This activity could be part of a bigger theme under pollution. The activity could be the water part and the bigger focus could contain all other types of pollution.

In this video segment adapted from Northwest Indian College, Lummi Elders explain how a decline in the availability of salmon reflects a threatened environment that must in some way be protected.

Spreadsheets Across the Curriculum module/Geology of National Parks course. Students work with salmon-trace streambed data to study whether removal of a spawning run barrier was effective

Students build a saltwater circuit, which is an electrical circuit that uses saltwater as part of the circuit. Students investigate the conductivity of saltwater, and develop an understanding of how the amount of salt in a solution impacts how much electrical current flows through the circuit. They learn about one real-world application of a saltwater circuit — as a desalination plant tool to test for the removal of salt from ocean water.

This resource presents detailed information about the hippotpotamus, including several photos and an audio clip.

This resource provides detailed information about the warthog, as well as several pictures.

This animation adapted from NASA shows the orbital paths of spacecraft in NASA's Earth Observing Fleet that are a source of wide-scale, primary research about Earth.

In this field lab students will go outside and observe a particular area of the schoolyard. Students will design investigations to complete outside and will use outdoor observations to provide evidence for our indoor activities.

Question and answer site that contains a discussion of commensalism as it pertains to sea slugs. Nice photographs of aquatic commensalistic relationships.

This video from Thinkport introduces the seahorse, an unusual, endangered fish that has puzzled scientists who are attempting to save it.

In this video segment adapted from the College of Menominee Nation, tribal members share examples of how seasons are changing, and how these changes are affecting local plants.