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In this activity, learners create volcanoes like those they have examined on Earth and Mars through images taken by spacecraft.

In this activity, learners consider how oil spills behave in the ocean and what impact they have on marine wildlife.

Using simple, inexpensive items, learners build and test submarine models.

In this activity, learners explore the concept of density-driven currents (thermohaline circulation) and how these currents are affected by climate change.

Lakes, streams and other freshwater bodies are a habitat for lots of living things, big and small.

In this classic activity, learners investigate natural selection by becoming birds foraging for food on an island.

In this activity, learners take on the role of a carbon atom and record which reservoirs in the carbon cycle they visit.

In this outdoor activity, learners make models of homes that might protect small animals from the elements, then search living plants for real structures made by small animals.

In this activity, learners explore how engineers design devices that can detect the presence of pollutants in the air.

In this outdoor activity that can be combined with a hike, learners try to match a "mystery community" by shaking animals out of different trees and shrubs.

In this activity, learners assemble large cubes to make nano-related images. Learners discover how different objects are related to nanoscience and nanotechnology.

In this ecology activity (page 8 of the PDF), learners explore how to filter contaminated water using a variety of materials.

Learners follow directions to construct a water-powered electrical generator using a turbine made from plastic spoons.

In this activity (p.24 of PDF), learners make paper with fungi. Learners discover that paper is basically a flat mat of fibers.

In this activity (page 13 of the PDF), learners discover how weathering and erosion change the Earth’s surface.

In this activity, learners construct models of plants that are adapted to living under specific environmental conditions.

In this outdoor activity, learners plan a simple foot path and create an environmental impact study of the natural area where the path would be.

In this outdoor, sensory activity, learners role play as animals trying to identify their "family's" scent and locate their "territory." Learners mark their territories and sniff out other territories

In this outdoor activity, learners visit the intertidal zone of a rocky coastal site well populated with marine organisms.

In this outdoor activity, learners saw sections from fallen trees, then count tree rings and look closely at patterns of tree growth.