Isopod Lab Report

b. Dependent Variable: the variable that I am measuring (it depends on the independent variable)

Wet and Dry Environments To find whether Pill bugs gravitate toward a wet or a dry experiment, two coffee filters were cut to the size of the petri dish and placed inside, however one was dampened before being placed on the bottom. Dirt was then added on top to promote a more realistic environment and five Pill bugs were placed in each side before starting to prevent bias on an environment. A log was taken every thirty (30) seconds for ten (10) minutes on how many bugs were in each chamber and a graph was then made to show the changes of the bugs' positions over time. Again, if a Pill bug was in the transgression tunnel he was determined to be in a dish by the direction he was moving or the way it's head was facing.

The dependent variable is pulsation rates of L. variegatus before and after they were in the treatments. The standardized variable of this experiment would be the temperature of the surroundings of the L. variegatus, the three pulsation rates taken for each worm before and after the treatments, and also the amount of time each worm was kept in their respective treatments. The level of treatment for this experiment would be ten because of the six different concentration treatments of caffeine and nicotine along with the four household drugs. The sample size of the experiment differed from some treatments to other. For the three different concentrations of caffeine and nicotine, the sample size was 18 black worms each. The sample size of the control treatment of week 1 was 6 black worms. 12 black worms were used for the control of week 2, decaffeinated coffee and instant coffee. 11 black worms were used for the tea treatment and 15 were used for the tobacco treatment. There were three replications of the pulsation rate readings per worm before and after the treatment. With all this information we were able to get the results we got.

Keeping the experiment isolated on the focus of body size is as simple as not changing any other variables concerning the experiment. Therefore, predator number, predator size, habitat type, and any other possible variable in the experiment that is not body size will be kept as consistent and identical throughout the groups and replicable tests as

The purpose of this lab was to save a little gummy worm named Sam from drowning. In addition, one of the labs key terms was a hypothesis which is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation. Furthermore, we also learned that an independent variable is a factor that is changed during the experiment. On the other hand, the dependent variable is the factor that is observed or measured during the experiment. To begin with, the experiment the hypothesis formulated was if we reshape the paperclips into hooks and pick up sam, and the lifesaver (without touching them), then the lifesaver would be stretched enough for Sam to go through it.

This experiment was performed to observe the taxis and kinesis of certain organisms. This is important because the organism’s survival and ability to reproduce depends on how they orient to stimuli using senses. We investigated the behavior of pill bugs to determine if they’ll move towards or away from the vinegar through smell. If I place pill bugs in a behavior tray with different chambers, then they’ll move away from the chambers that contains vinegar. A behavior tray with 5 chambers is used and 2 were control while the other 2 has cotton balls with a few drops of vinegar on it. 5 pill bugs are positioned in the center of the chambers and is covered with a transparent cover to observe the organisms for 10 minutes. Results had shown the class

Next the beetle was weighed and it’s weight was recorded. The dental floss was then tied around the second and third legs, and taped to the petri dish. A strip of cloth was also needed to provide traction for the beetle. Then, the petri dish was removed from the beetle and the weight of the petri dish was recorded. The experiment was then ready to be performed. Paperclips were added to the dish every 5-10 seconds until the beetle could pull it no more. Then, the petri dish was removed from the beetle and the weight of was recorded. This experiment’s dependent variable was the amount of mass the beetle can pull, and the independent variable was the mass of the beetle. There was no control group in this experiment. These were the materials and methods used to conduct this

This information is true because the data have a p-value of 0.055793. This also allows us to support the null hypothesis, and reject the previously stated hypothesis. Shifting next to hypothesis 2, using the chi squared test to find a p-value of 0.00000000605505 to determine that acidity of a region had a significant relationship between the amount of isopods and the amount of acid or base present. This means that we should reject the null hypothesis, and support our original hypothesis. Now, hypothesis 3 had a p-value of 0.001823 showing us that the relationship between the isopod count and the amount of light present is significant. This information disproves the null hypothesis, as well as the previously stated hypothesis because the isopods were in fact drawn to a darker environment. Lastly, hypothesis 4 gives a p-value of 0.0000000153118 expressing that the relationship between temperature and amount of isopods are significant. This allows us to determine that we should reject the null hypothesis as well as the original hypothesis due to the fact that there was a significant amount of isopods in the cold

The purpose of our experiment is to test animal behavior and reactions to a change in environment. Our guiding question is, “Why do living organisms respond to environmental factors?” This is basically a question that is asking why living things will react a certain way to environmental changes. The task to answer this question is to experiment with changing environmental factors with pill bugs.

Analysis: The data and results from this experiment were mixed and unclear. We chose to do three separate trials, with a different group member in charge of each of them. From the beginning, we observed that the pill bugs had no sense of where they were being put in captivity and were inactive in middle of the enclosure. This shows the rolly pollies applied a more kinesis approach to their animal movement, since they were not aware of their surroundings.

1. For this experiment, what were the independent variable and the dependent variable? What were the constants?

A Chi-square test was used for hypothesis testing. This is used to determine that the observed number of wins of the resident from the trials is different from what would be observed by chance. The null hypothesis was observed wins will be equal to that expected by chance. On the other hand, the alternative hypothesis was observed wins will not be equal to that expected by chance. The class’ hypothesis was proven correct that resident male crickets have a greater motivation to defend

The experiment lasted 15 consecutive days. During the experiment, the rats were placed into 12 identical operative chambers which was used for all behavioral training and testing. Each chamber had an automatic retractable lever

The purpose of our experiment was to observe the behavior of the pill bugs. We were trying to find exactly whether the pill bugs would be attracted or repelled by the chemicals. The chemicals used were vinegar, water, salt solution and a sugar

The independent variable for the experiment was the paper towels. The dependent variable was the absorbency and strength. The constants for the experiment were the size of the paper towels that were used, the amount of water, the size of the beaker, the size of the cylinder and the amount of the weight.