River in Action Geology Teaching Model Subcategory_Prepared Slides Simple-form wheel and axle with

Simple-form wheel and axle with a larger wheel on a smaller axle

there may be minor imperfections that do not affect physical function

One hundred numbered slots in a hardwood storage box hold standard microscope slides for ordered reference and classroom slide-library organization

dropping a chosen capacitor into a circuit without unsoldering during introductory RC-circuit and resonance investigations at the bench

oral cavity

River in Action Geology Teaching Model Subcategory_Prepared Slides Simple-form wheel and axle withHand painted river development model tracking how a watercourse shapes terrain from headwaters through meanders to delta, with each stage labeled on a wall mountable backboard.