American Chemical Society
American Chemical Society: Best of Wonder Science: Air: It's Really There [Pdf]
An experiment to explore the properties of air, using a cup placed upsidedown in water.
PBS
Pbs Kids: Science Rocks: Air Lift
Through this experiment, students are challenged to lift a book (and other items) with just air. Requires simple household items, gallon-size, zipper-lock plastic bag, book, pencil, drinking straw, and tape.
NASA
Nasa: Gas Properties Definitions
Use this site to learn about basic gas properties including motion, viscosity, and compressibility. Includes links to activities for all ages.
Other
Air Blaster: Smoke Ring Launcher
Steve Spangler shows how you can blow a cup off of your friends head and his or her papers off the desk with this "air blaster" or "AirZooka." Demonstrate that air does take up space and how air moves. What fun!
Science Museum of Minnesota
Science Museum of Minnesota: Air Cluster
Interesting site with links to activities about wind and air in many forms. Browse the different activities and investigations on the properties of air on the toolbar to the left of the page.
Texas Instruments
Texas Instruments: Measuring Air Pressure
This activity is intended for an Introductory Meteorology class; an earth science elective intended for Juniors and Seniors. (It was orginally modifed from an Introductory Meteorology Laboratory Assigment taught to undergraduates at...
Museum of Science
Museum of Science and Industry: Activities: Fly a Hot Air Balloon
Step-by-step instructions, with photos, of how to construct a hot-air balloon from tissue paper, to demonstrate that heated air expands, creating a convection current. This activity requires the use of a hot air gun and is labor-intensive.
Other
60 Second Science: Air Putting It to Work
Investigate the properties of air. Observe the water vapor present in our exhaled breath.
How Stuff Works
How Stuff Works: How Helium Balloons Work
This article explains how helium is able to keep balloons afloat in the air. Compares them to how hot air balloons work. Includes a video, and some activities to try for testing the principles being discussed.
PBS
Pbs Kids: Dragonfly Tv Do It: Carbon Dioxide
PBS site offers an experiment kids can do at home to see how carbon dioxide can put out burning candles.
Museum of Science
The Atoms Family
Let this classic family of monsters guide you as you learn about energy. Interactive exercises, experiments, and demonstrations help to build knowledge and raise questions.
McREL International
Mc Rel: Whelmer #12 Learning Activity: Bernoulli Cans
An easy to do activity that investigates Bernoulli's principle. The activity is presented in lesson plan format that meets NSES standards.