Does air have mass?

As we previously noted, air consists of matter, and any matter has a mass. In order to prove that air has mass, each student is required to conduct the following experiment and post the results for comparison.

The Experiment:

Material:
- Any balloon
- Precise digital scale (found in your school science labs)
- Recording chart

Procedure:
1- Record the mass of an empty balloon by placing it on the scale.
2- Inflate the balloon half-way, and record its mass.
3- Inflate the balloon fully, and record its mass.
4- Deflate the balloon completely, and record its mass.

Now, in order to find the mass of the air inside the balloon subtract the results of steps 2-3-4 from the result of step 1 individually. You will realize that after deflating the balloon, its mass will go back to what it was at the beginning of the experiment

-Experiment reference:
Spock, A. (n.d.). Does air have mass? Retrieved December 26, 2009, from http://www.theteacherscorner.net/lesson-plans/science/earth/air.htm
-Photo reference:
The editors of publications international, Ltd. (n.d.) Water games for kids. Retieved December 26, 2009, from http://home.howstuffworks.com/water-games-for-kids6.htm