"PARKWAY PLASTICS, INC."

Compare How Different Gear Configurations Function

Closed Case Form Electroscope is enclosed, preventing air currents from affecting the deflection of the leaves.

Educators can conduct a comprehensive array of density experiments with the density/slope class set.

Electrostatic charges are indicated by the deflection of a black plastic straw pivoted on a pin. The polished zinc plate on top is used to demonstrate photoelectric effect and various other electrostatic demonstrations. The metal case measures 14 cm in diameter. The scale is graduated in 10° increments in two quadrants.

This ripple tank is transparent, acrylic plastic and supported in a sturdy plastic frame.

A simple tool for communicating complex workings of electricity, this plastic battery holder is fitted with three banana plug jacks.

Easily Explain Rotational Inertia

The Centripetal Force Kit is inexpensive and effective.

A Good Optics Set for Demonstrations or First Experiments

This set features a handy, economical selection of density cubes.

The Density Identification Set is ideal for an investigation lab.

This solid socket board holds light bulbs for circuit experiments.

Drilled balls are used for pendulum bobs or impact experiments, while our other balls are suitable for collision apparatus and density/volume experiments.

Bearing ball set of 3.

Four gears of different sizes, perfect for any investigation or maker project.

Lessons in Optics and Light in the Palm of Your Hand Colorfully illustrate additive and subtractive color mixing, color transmission, absorption and filtering of the different wavelengths of light with this set of primary and secondary color mixing paddles. You can also use the diffraction gratings in this set to view spectra from different light sources. Show students how a spectroscope, colored lights, and even polarized sunglasses work with the contents of this set.