2. Oxygen Nitrogen CO2

3. For example C02 WE proved it by putting a candle in a cup with baking soda and then we lit the candle and put vinegar in with the baking soda and made co2 Which puts out the candle.

4. Balloons float by using helium. You can get helium by a compressed air tank.Helium floats. Just like when you put it in balloons.

6. -when we put a candle in a cup and use another cup with co2 in it we poured the co2 into the other cup and the candle went out.

9. This is all the gasses in the air. Nitrogen, oxygen, argon, carbon, dioxide, neon, helium, krypton, hydrogen, and xenon.

11. http://www.ipl.be/private/Chimie/a_voir/arc hives/cestavoir1/cestavoir_sommaire.htm http://mattson.creighton.edu/CO2/ http://www.usatoday.com/tech/columnist/archive. htm https://www.iserve.co.nz/users-nt/skotel.com/rates.asp