In this short demo/activity, a balloon with baking soda in it is stretched over the mouth of a flask or bottle containing vinegar.
The Story of Fossil Fuels, Part 3: Gas
What are greenhouse gases?
NASA's Earth Minute: Gas Problem
Have a Greenhouse Gas Attack!
Image credit: The original activity
[Suggest a book]
Air : outside, inside, and all around by Darlene R Stille
Matter by Andi Diehn
What is a gas? by Jennifer Boothroyd
What is the world made of? : all about solids, liquids, and gases by Kathleen Weidner Zoehfeld and Paul Meisel
Many Kinds of Matter : A Look at Solids, Liquids, and Gases by Jennifer Boothroyd
Change it! solids, liquids, gases and you by Adrienne Mason and Claudia Dávila