Comparative Terrain Landform Model Set with Mountain Overlay, 23.5", 2-Piece Subject_Chemistry Optically worked rectangular glass refraction

Optically worked rectangular glass refraction block at 75 by 50 by 12mm with slightly beveled edges

General-purpose laboratory support stand sized for accessory apparatus

dropping a known resistance into a circuit without rewiring during Ohm's-law work

Brass nine-piece 100 gram slotted mass set with a 100 gram hanger

Comparative Terrain Landform Model Set with Mountain Overlay, 23.5", 2-Piece Subject_Chemistry Optically worked rectangular glass refractionPaired 23. 5 inch cross section models with a removable ancient mountain overlay, revealing how erosion, deposition, and tectonics reshape terrain over geological time.