Origin of the Earth Teaching Model Item Type_Weights the 90-45-45-degree faces redirecting light

the 90-45-45-degree faces redirecting light through right angles for total internal reflection and image-inversion demos

Twelve-position rotary capacitance substitution box selecting one capacitor at a time

this bottle of coarse 20-mesh iron filings is a staple for classroom magnetism and field-pattern demonstrations

and connecting leads mounted on 4mm-socketed bases for building circuits from 40-plus components

Solid 2-inch acrylic cube with polished faces

Origin of the Earth Teaching Model Item Type_Weights the 90-45-45-degree faces redirecting lightDepicts the geological processes of Earth's formation and the development of its structural layers, labeled on a wall mountable backboard.