PROBLEM STATEMENT: What affect does water temperature have on the amount of light given off from a fishing glow-stick?
RESEARCH: Some advertisers claim that glow stick products can attract greater numbers of fish thus increasing their catch. It has been known for centuries a number of aquatic organisms are attracted to light. Some advertisers claim that the use of 'glow stick' type porducts attract greater numbers of fish. They are attached to the fishing line near the fishhook. Many of the Washington State rivers are between 2 and 10 degrees Celsius. The marine waters of Puget Sound are often between 6 and 9 degrees Celsius.
HYPOTHESIS: If the water is cold then the glow stick will be bright because background information indicates water heated above 37 degrees Celsius the glow stick won't work properly.
2 Glow Sticks
2 Celsius Thermometers
Procedure: First, put a glow stick in 20 degrees Celsius water, the glow stick should stay at 1.4
lumens, this is your controlled variable. Then take another glow stick (same brand) and make sure you crack the controlled variable glow stick and this glow stick at the same time and put them both in 20 degrees Celsius water and just leave the controlled variable one alone. The temperature of the water is the manipulated variable. The amount of light in lumens is the responding variable. Then add ice in the beaker until the temperature drops down to 5 degrees Celsius and record the brightness in lumens. Then take some ice out until it is 5 degrees higher (10 degrees Celsius), and continue doing this all the way up to 35 degrees Celsius, because at 37 degrees Celsius it doesn't work anymore.
CONCLUSION: Yes, my hypothesis supported my procedure...