Rocks and Volcanoes Teaching Model Subcategory_Stopwatches and Timers Higher-impedance single-decade resistance box stepping

Higher-impedance single-decade resistance box stepping from 10k to 100k ohms in 10k-ohm increments

Stamped N and S ends on this 3 x 0

Triple tandem plastic pulley with 25/38/50mm ball-bearing wheels on an open-sided 17

Six 10 x 10cm unmounted plastic filter squares - red

Mass-calibrated copper block calorimeter at 1kg adjusted within +2%

Rocks and Volcanoes Teaching Model Subcategory_Stopwatches and Timers Higher-impedance single-decade resistance box steppingDepicts sedimentary, igneous, and metamorphic rocks alongside volcanic structures on a wall mountable labeled backboard, serving as a rock cycle and volcanism reference.