Long awaited method

This is the 'refined' method which will hopefully meet all the requirements...

* During the research, I found that rubber bands were classified with a size number according to the thickness, length and width of the rubber band. In my experiment, I will be using size 16 rubber bands.

Equipment

Picture 1- Size 16 Rubber bands






Picture 2- Safety goggles

Picture 3- Spring balance hanging from hook

- 1 pack Esselte Superior Rubber Bands- Size Number 16x 45*
- Safety goggles
- gloves(optional)
- Oven
- Freezer
- Spring scale

Method (2):
1) Put on safety goggles and gloves.
2) Hang a spring scale from a secure hook as shown in picture 3.
3) Take 45x Size No.16 Rubber bands and sort them into 3 piles of 15 rubber bands each.
4) Place the first group of 15x rubber bands in the freezer at 0 degrees Celcius for 2 hours.
5) Take the rubber bands out of the freezer and immediately place a frozen rubber band onto the spring scale as shown in picture 3. Pull downwards on the rubber band.
6) Record the measurement on the scale (amount of grams exerted on the rubber band) just before the rubber band ruptures.
7) Repeat steps 3)-6), instead using the second group of 15x rubber bands at room temperature (20 degrees Celcius)left for 2 hours.
8) Repeat steps 3)-6)instead using the third group of 15x rubber bands heated in an oven at 70 degrees Celcius for 2 hours.
8) Record and tabulate results.