Carbon Cycle in Soil Kit for Global Warming and Feedback Loops Chemical_Mineral Oil Versatile holder accepting either a

Versatile holder accepting either a 50mm-diameter lens or mirror

Two pith balls suspended on unspun silk from a brass pillar

Single-axis focusing geometry of this cylindrical lens lets students see how a curved surface forms line images

and landing pad for quantifying gravitational acceleration and drag from air resistance

showing how current through an iron core builds magnetic flux in student investigations

Carbon Cycle in Soil Kit for Global Warming and Feedback Loops Chemical_Mineral Oil Versatile holder accepting either aCarbon cycle soil kit explores global warming through soil respiration measurement, ecosystem analysis, and climate chemistry investigation.