What are the controls AND variable in this experiment?

Solubility vs. Temperature of CO2 gas in soda





Soda is a drink that has CO2 dissolved in it. It must be kept under pressure to keep the CO2 dissolved. Opening a soda, allows the COs to bcome ';undissolved'; and ';fizz';. What is the effect of heating it?





Purpose: To observe if there is a difference in amount of gas dissolved in soda when it is heated.





Procedure:


1. take care during this exp. to control all the variables execpt the temperature of two containers of soda.





2. take a 12-16 oz can or bottle of soda and divide it evenly between two containers, one of which mush be microwavable or heatable on a stove.





3. Microwave or heat one on the stove until the soda boils vigorously (about 3 mins in the microwave open). The other one will remain sitting on the counter.





4. Fills two identical glasses with lots of ice. Pour the soda from one container into one of the glasses of ice at the same time as poruing the soda is the other container over the other glass of ice. Observe.What are the controls AND variable in this experiment?
The independent variable is the variable that is being changed: the heat





The dependent variable is the variable that changes as a result of what you did to the experiment: The difference in amount of gas.





The control is the the soda that is not heated, so you can see if there is a difference.