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# GLOW STICK LAB

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by

## Regina Escobar

on 9 October 2014

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#### Transcript of GLOW STICK LAB

DATA
MATERIALS NEEDED:
3 glow sticks
3 cups
water: hot, cold (ice water), room temperature
graph paper
ruler
PROCEDURES
PARTS OF A VALID EXPERIMENT
INDEPENDENT VARIABLE: Temperature
DEPENDENT VARIABLE: Luminescence of glow sticks
CONTROL GROUP: Glow stick in room temperature water
EXPERIMENTAL GROUP(S): Hot water & Cold water
QUESTION
If the glow stick is in cold temperature then the luminescence will be brighter because the glow sticks become brighter in cold temperature.
HYPOTHESIS
Will the luminescence of a glow stick change depending on the temperature its around?
PRESENTED BY:
GLOW STICK LAB
Regina Escobar, Nathalia Murillo, Jacquelyne Gutierrez
Procedures:
1. Fill cups with different water temperatures
2. Get 3 glow sticks of the same color
3. Crack each glow stick
4. Put 1 glow stick in each cup
5. Turn off lights, make sure its a dark room
6. Compare the brightness of each glow stick by using paper and ruler to measure how far the luminescence of the glow stick reaches
7. Collect data
8. Accept or reject hypothesis (conclusion)
0
1
2
3
4
Temperature
Room
Hot
Cold
2.7cm
4.9cm
4.6cm
CONCLUSION
Key
Room
Hot
Cold
In conclusion, I reject my hypothesis because during my experiment the brightness of the cold temperature was 4.6 cm and the hot temperature brightness of the glow stick was 4.9 cm . My experimental group had a brightness of 2.7 cm.
MISTAKES AND IMPROVEMENTS
I could improve my project by getting more accurate data. A mistake I made was measuring the brightness close to other glow sticks. The temperatures of the water cups were exact, so that worked well. Next time I will test the time it takes to adjust to the temperature its around.
Brightness changes in temperature
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