Measure the relationship between the volume of a gas and its pressure, when the temperature of the gas is held constant.
http://www.sciencebuddies.com/mentoring/project_ideas/Chem_p011.shtml
Even Fulton would have loved one of these
http://www.energyquest.ca.gov/projects/steamboat.html
Water is made up of two elements, hydrogen and oxygen, and these gases can be produced through electrolysis.
http://www.energyquest.ca.gov/projects/split_h2o.html
Properties including freezing-point depression and boiling-point elevation, and explain how these properties are relevant and important in nature or daily life.
http://www.sciencebuddies.com/mentoring/plugin_solutions.shtml
What is air pressure? Did you know you can make something that will measure air pressure? You can actually do a bit of weather predicting from a simple made-at-home piece of equipment.
http://starryskies.com/try_this/baro1.html
This experiment involves the observations of different shaped drops of liquids of varying viscosities
http://scssi.scetv.org/mims/schools/blhs/science/stepha1.htm
The students will demonstrate the ability to investigate what air is like and where it is found. The children will sense that air is real by capturing it, squeezing it, carrying it, and feeling its weight.
http://ofcn.org/cyber.serv/academy/ace/sci/cecsci/cecsci097.html
The purpose of this experiment is to examine how differences in surfaces affect the adhesion of several brands of tape
http://scssi.scetv.org/mims/schools/blhs/science/amos1.htm
This experiment helps us identify the different contaminants in the air around us.
http://www.hhmi.org/coolscience/airjunk/index.html
Not all bubbles are made with soap!
http://www.exploratorium.edu/science_explorer/balloon_blowup.html