Carbon Cycle in Soil Kit for Global Warming and Feedback Loops Chemical_Mineral Oil Plastic sheath and rubber hanging

Plastic sheath and rubber hanging cap on this 12-inch yellow-backed spirit thermometer reading -10 to 110°C

Concentrated rheoscopic fluid for mixing into pearlescent water suspensions that reveal currents

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

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

Two pith balls suspended on unspun silk from a brass pillar

Carbon Cycle in Soil Kit for Global Warming and Feedback Loops Chemical_Mineral Oil Plastic sheath and rubber hangingCarbon cycle soil kit explores global warming through soil respiration measurement, ecosystem analysis, and climate chemistry investigation.