1 freezer thermometer

1 candy thermometer
Large pot

Flexible measuring tape

One room temperature area

One above room temperature area

One cool area, far below room temp

Clock-timer

Place for note taking

Graph creator

Step 2: Measure the temperature of my room temperature room, with my thermostat. Write this temperature in the first box under temperature. Leave the balloons at least 2 feet above the ground at room temperature. Measure the balloon's circumference at the widest part, not so tight that the balloon is being squeezed. Write down measurements under each balloon in the table. 

Step 3: Clear out a space large enough for a balloon to sit for one hour. Place one balloon in the freezer as well as the thermometer for one hour. Immediately remove the balloon and measure the circumference right away. Do this step for all other balloons. After all balloons have been in the freezer for one hour each, immediately measure the last circumference. Write down the temperature as shown on the thermometer. 

Step 4: Allow the last balloon to come to room temperature for 20 minutes. Over medium- low heat, place the balloon within a pot. Leave for about 5-10 minutes or until I see changes. Immediately remove balloons from the hot temperature, and record circumference in the table. Measure temperature according to the candy-thermometer.

Step 5: Find the average of the data. First, add up all of the circumferences for each temperature, then divide by 3 and this will be the average. Cube the average for each temperature, by multiplying each average by itself 3 times. 

Step 6: Then, to create the graph, plot each temperature in celcius on the x axis on some graph paper. Then plot each average circumference cubed on the y axis. Then, draw a line by hand. ? 

There is not a linear relationship between the circumference and the changes in temperature. Because the number of degrees isn't constant as the environment changes, and the circumference increases and decreases at different rates, the relationship isn't linear. 

When going from room temperature to hot temperature, I took down about a 3 cm change on average in circumference. I noticed that as the balloon was in the pot of hot water, it would rotate, and as soon as I took it out, the balloon was warm and misty on the outside. And then, when going from room temperature to my cool temperature, I noticed that the circumference changed by about 1.5 cm on average. I noticed that the balloon was less firm than at room temperature when it was immediately taken out of the freezer. 

When the temperature outside of a balloon increases, according to Amontons law, when the temperature outside increases, gas molecules will increase in speed and energy, and as the balloon holds the molecules in its walls, the pressure increases due to the more forceful collisions from the energized molecules. A balloon is able to change in size and shape depending on how the gas molecules inside of it react, so according to Charles Law, the pressure a gas gains from the temperature outside, the pressure inside can only be maintained if the space increases in size. I think that the gas molecules increase in pressure by creating more forceful collisions that make the balloon expand in space. 

As the temperature decreases on the outside of the balloon, the gas molecules will have less energy, and less space between them. The motion of the gas molecules is what keeps the balloon inflated, if these molecules have less space between them, because they are cooled and not heated, they give the opposite effect of heating when the molecules will have more space between them, the balloon will shrink in size. The pressure outside of the balloon is equal to the pressure inside, and this means when cooled, the pressure decreases.