After some consideration, I have decided that the petrol consumption experiment involves too many variables that cannot be controlled adequately. I had an idea for a new experiment investigating the durability of different types of glue (wood, paper, waterproof, glue stick) in bonding different types of surfaces (porous and non porous). I will have to write up a formal method for this experiment.
The basic plan is to bond two surfaces with glue, wait for the glue to dry, and then incrementally increase the weight on the bond until it breaks.
Dependent variable: type of surface (porous/non porous), type of glue
Independent variable: Amount of weight held before the bond breaks
Controlled variables:
-- Surface area of glue: 1cm2
-- Amount of glue: 0.5mL (Luckily I have loads of tiny measuring syringes from medicating sick guinea pigs)
-- Weight of container... probably some sort of plastic bag, maybe a Snap-Lock sandwich bag?
-- Weight placed into bag: Water in 5mL (5g) increments
-- Amount of time glue allowed to dry before being tested: Probably 24-48 hours; I'll check the "recommended drying" times on glues and use the longest one.
-- Weather conditions of testing: Humidity, temperature etc. This probably won't be a problem as they'll all be in the same area, on the same day. The experiment will also be repeated several times on different days.
I think this experiment will be possible to carry out and control.
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