Week 13: Discussion, more research (finishing touches)

The report is nearly complete, things I still need to add tonight are:

-Bibliography (my report currently only has a reference list)

-Pictures (no pictures were taken during the investigation)

Discussion sample:

1. What were the general trends/patterns observed?

The general trends in this experiment show that the size of the balloon over the Pepsi bottle was greater than that of the balloon over the No Frills bottle. This was the case in every experiment trial, although the amount of difference changed slightly.

Research sample:

Carbon Dioxide and balloon capacity:

-1 ton (1000kg) of Carbon Dioxide gas takes up 556.2m³. This is 0.56m³ per kg.

-The package of the “large helium-quality” balloons which was purchased for the experiment states that the circumference of the balloons, when fully inflated, is 30cm.

There was also a subheading of "Home brand vs Regular Brand" added as well as an expansion of information under the heading of "over-view of soft drinks"

Week 12: Graphs drawn, changes, variables added

Sample graph: (there are four total in the report)

Experiment variables:

Independent: The brand of soft drinks used (home brand and regular)

Dependent: The amount of carbon dioxide gas inside soft drink bottles (measured indirectly by the space taken up by the gas)

Controlled:  -The type of balloon used

                     -The amount of liquid inside each bottle

                     -The size of each bottle

                     -Consistency in soft drink brand for each trial

                     -The size of the bottle neck

                     -Temperature of the drinks

In the equipment list, "Pack of balloons" is changed to:

-Pack of large helium-quality balloons (minimum of 6)

 

Week 12: Results table

Results-

	Pepsi balloon diameter (cm)	No Frills balloon diameter (cm)
Trial one	25	21
Trial two	27	20
Trial three	25	23

Week 11 (late): Reliability/validity mind map

A mind map exploring the reliability and validity of each test idea that I used to decide on the Balloon wrap experiment. (click to expand image)

Week 10.5: Changes to aim and equipment

Aim changed from "To compare the rate of bubble retention in different brands of soft drink."

to "To compare the difference in carbon dioxide levels in home-brand soft drink bottles and regular-brand soft drink bottles."

New equipment list:

-3 Pepsi 1.25L bottles

-3 No Frills 1.25L bottles

-Pack of balloons (minimum of 6)

-Safety goggles

-Flexible measuring tape

-Heavy black marker

Note: Pepsi represents the regular brand and No Frills represents the home brand

Week 10.5: Method written, equipment modified

 Equipment list:

-Pepsi 1.25L bottle

-Coca Cola 1.25L bottle

-No Frills 1.25L bottle

-Home Brand 1.25L bottle

-Pack of balloons (minimum of 4)

-Safety goggles

-Flexible measuring tape

-Heavy black marker

-Ruler

Method:

1. Measure the half-way point from the bottom of the each deflated balloon to the top.
2. Draw a horizontal line across the balloons at the half-way point on both sides.
3. Wrap the balloons over each of the soft drink bottles (do not open them) until the cap is completely covered.
4. Open the cap of a bottle completely and quickly and step away from the bottle immediately.
5. Measure and record the length of the marked line on the balloon using measuring tape.
6. Repeat steps 4 and 5 for the rest of the bottles.

Week 10: Experiment success!

A larger balloon brand was bought and the trial experiment was a success.

(see attached image)

Full experiment will be performed in the coming week.

Also, duct tape is removed from the equipment list (the balloon is already tight enough)

Week 9: Trial experiment

Trial experiment failed, the balloon was too small, and had to be too tightly wrapped around the bottle. When the lid was opened, it instantly bursted.

Suggested Solutions:
-Find a larger balloon to use
-Change the experiment entirely