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Activity
PBS

Pbs Teachers: Scientific American: Forever Wild? Input and Output

For Teachers 5th - 9th
Investigate the scientific principles of biospheres, and observe the effects of biological processes on closed systems.
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Graphic
Hunkins Experiments

Hunkin's Experiments: Salad on a Sponge: Grow Your Name

For Students 4th - 9th
Hunkin's Experiments is a group of simple cartoon illustrations of scientific principles. Some would work well in the classroom, but others have little value beyond entertaining students. All of the projects are easy to do. Both of these...