Air Bottle Models
Help students see the gases in the Earth’s atmosphere with one million different-colored
spheres and what it means for a contaminant to be found in a concentration of one part
per million with a lone black sphere among 999,999 yellow ones in these 3-liter models.
A. AP7558—Air in a Bottle—Demonstration Model—$55.40
B. AP4854—Becker Bottle “One in a Million Too”—$50.85
Measure barometric pressure, relative humidity and
air temperature, and record the trends, averages and
highs and lows. 3" diameter dials nest in carrying case.
Water Quality Educator and
Complete modular program for testing the quality of
your water. Includes CD-ROM and durable fabric tote.
Dissolved Oxygen Meter
One-hand operation and automatic temperature
compensation and calibration to air allows students
to determine water quality.
Effects of Air Pollution Kit
Prepare a controlled environment and generate
sulfur dioxide to demonstrate the harmful effects of
contaminated air on plants.
Help students explore the natural world and
increase their awareness of the consequences
of human activity on the environment.