General Products

Visual comparison of the conductivity of different solutions. The green LED is numbered from 1-10 and will light up as the probes are dipped into the solutions of salts or acids. From 1 (low) to 10 (high).

*Batteries not included.

Battery type: 23Ae 12V

STEM experiment.

Convection is a method of heat transfer in liquid and gases.

Learn about convection in real-world situations such as air-conditioning, building fires, and why the wind changes directions at the beach!

Air heated by a candle moves up one chimney while cooler air moves down another to replace the lost air. These currents can be seen against a dark backdrop. Includes: metal box with glass front; two glass chimneys. You need a smoke source.