Pill Bugs Attraction to Colored Lights Introduction: This experiment was

Essay by EssaySwap ContributorHigh School, 12th grade February 2008

download word file, 3 pages 0.0

Downloaded 5239 times

Pill Bugs Attraction to Colored Lights Introduction: This experiment was conducted to see which colored light pill bugs would prefer more out of red, blue, yellow, and green lights. If pill bugs went to the green and yellow lights more than the blue and red lights, then this means they like brighter lights more than gloomier lights. For the experimental group, the colors used were blue, red, yellow, and green. The controlled group was the middle chamber. It got regular light from the classroom. The independent variable was four different colors of the lights. The dependent variable was the light they chose to go to. After three trials that lasted ten minutes each, we recorded all the information down in a table.

Procedure: Materials: 10 Pill Bugs, 4 Lights (1 Yellow, 1 Red, 1 Blue, 1 Green), 1 Chamber with 4 dividers, and a stopwatch.

1.) You must collect 10 pill bugs.

2.) Put each different light color light in one of the sections in the chamber.

3.) Put the 10 pill bugs in the middle of the chamber with four dividers.

4.) After each minute, record down how many bugs went to each light. Use your stopwatch to have an accurate minute.

5.) Repeat step 4 for 10 times which equals a total of ten minutes. Each trial is ten minutes. You have to do 3 trials total (30 minutes).

6.) Put all of your recorded information on your data table now.

This is a controlled experiment because I control all of the independent variables and everything else there is in the experiment except the dependent variable.

Number of Pill Bugs Time in Minutes Red Blue Green Yellow Trial 1 Trial 2 Trial 3 Trial 1 Trial 2 Trial 3 Trial 1 Trial 2 Trial 3 Trial 1 Trial 2 Trial 3 1 0 2 4 1 1 1 1 2 0 5 4 5 2 3 1 4 1 0 1 0 1 0 2 5 4 3 4 2 4 0 0 0 0 1 1 3 5 5 4 2 2 4 0 1 0 2 0 1 2 5 5 5 3 3 4 1 1 0 1 0 0 4 4 6 6 3 3 4 2 0 0 0 0 0 4 4 6 7 3 2 4 2 0 0 0 0 0 4 5 6 8 4 2 4 1 0 0 0 0 0 4 6 6 9 5 2 4 0 1 0 0 0 0 4 7 6 10 3 3 4 1 1 0 1 0 0 4 6 6 Subtotal 30 22 40 9 5 2 5 4 2 36 51 55 Grand Total 92 16 11 142 Average 31 5 4 47 The pill bugs chose the "hot" colors over the "cold" colors. The hot colors are red and yellow and the cold colors are green and blue. The pill bugs must like more brightness since they chose the yellow light the most. The yellow light would definitely let more light shine through since it is a bright color.

The only thing not shown in the data table is the number of pill bugs that didn't move anywhere and stood in the middle chamber.

Conclusion: We performed this experiment to investigate which color light pill bugs would prefer the most out of red, blue, green, and yellow. If pill bugs went to the green and yellow lights more than the blue and red lights, then this means they like brighter lights more than gloomier lights. We found our hypothesis was NOT correct. The pill bugs chose the red and yellow lights a whole bunch of times each trial. The blue and green lights only had about 15 pill bugs each for all of the trials put together. In the end, yellow was first with 142. Red came in second with 92. Blue came in third with 16, and green came in dead last with 11. The experiment may have had some inconclusive results because some of the pill bugs just stayed in the middle of the chamber. The pill bugs might have done this because they had to do experiments with classes before us which made them tired. Next time you could get fresh pill bugs from the ground so they aren't tired when you test them in your experiment.