Rocks and Volcanoes Teaching Model Subcategory_Stopwatches and Timers Six 10 x 10cm unmounted

Six 10 x 10cm unmounted plastic filter squares - red

Designed to generate and detect ultrasonic waves above the audible range

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

Bulk 144-pack of pre-cleaned 75 x 25mm glass microscope slides features frosted labeling ends and ground polished edges for high-volume teaching labs

Rocks and Volcanoes Teaching Model Subcategory_Stopwatches and Timers Six 10 x 10cm unmountedDepicts sedimentary, igneous, and metamorphic rocks alongside volcanic structures on a wall mountable labeled backboard, serving as a rock cycle and volcanism reference.