Free Shipping on Orders over $199*
FREESHIPJAN BUTTON.png

Order early for pre-holiday delivery. Flinn will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025,
will ship after we return.  

FLINN
Your Safer Source for Science
PAVO
All-In-One Science Solution
Your Safer Source for Science
;
Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax
Email [email protected]

Seeing the Invisible

firewatch

Publication 12730

Price: FREE

Learn more about downloading digital content

Carbon dioxide is an odorless, colorless gas. In this demonstration, place several lit candles on a ramp, create some invisible CO2 gas in a beaker, and then “pour” the CO2 down the ramp. Students will observe the presence of the gas as successive candles are extinguished.