WHY? Carbon dioxide gas is heavier than air. When it is poured into the bag it will sink to the bottom displacing the air. The scale will tip to indicate the heavier carbon dioxide gas. Remember the gas is invisible so it looks like magic! ASSESSMENT: Extension can be used for assessment purposes. Can the student communicate what they observed?

The student is able to communicate that helium is lighter than air; therefore, it rises until the density of the air equals that of helium. The student is able to communicate that helium is lighter. The student is able to communicate that the gas in the balloon is different than the air. The student is able to communicate that the balloon goes up.

Web Hosting Provided By The National Business Aviation Association.

Explore Space ... Not Drugs!
Hear what astronauts have to say about staying drug-free.
Last modified: Sun Aug 10 18:00:59 PDT 1997

Copyright © 1997 by Cislunar Aerospace, Inc. All Rights Reserved.