The control variable influenced the results that we got in the bubble gum lab. First of all, getting gum stuck in your teeth or braces impacted the outcome. If it gets stuck in your teeth, the chewed mass would be lower than it should be, and would result in a higher percentage of sugar. This could explain why our groups percentage were higher than the company's control for the Bazooka gum by 1.3%. Also, the rate at which someone chews the gum affected the data, and might be the reason that Super Bubble’s percentage is low. I was chewing Super Bubble with my braces, and with my braces, I might not have been chewing as fast as I should have been. This wouldn’t have dissolved all the sugar, and would make the percentage lower than the control
We observed Sowbugs in multiple environments to determine which environment they preferred. The observational chamber was a rectangle box split equally in half. One side of this rectangle was filled with dry sand that had been heated for five minutes by a lamp, and the other side was filled with damp soil that did not receive the lamp heat. We placed each sowbug on the middle boarder of the cool, damp soil and the hot, dry sand. We each chose one sowbug to track, and made a record of its placement each minute for five minutes total. We repeated this process three times. After each repetition, we removed the sowbugs, and replaced them with new sowbugs to observe. After this observation, we shared, and recorded our results. The sowbugs spent
Constant: the dependent variable was the size of the gummy bear after it was soaked in regular water, salt water, baking soda water,and vinegar.
The purpose of this experiment was to identify which brand of mint gum holds its flavor the longest. The four brands I chose were Orbit, Trident, Ice Breakers, and Wrigley's Doublemint My hypothesis was that Trident brand would last the longest and Wrigley's Doublemint would last the shortest. I did not use any people in my test. I chewed the same amount of gum at a time and the gum was all the same flavor, mint. All the gum was bought at the same time from the same store. I chewed the four brands of gums between periods of time. When chewing, I timed myself with a stopwatch. When I believed the gum ran out of flavor, I stopped the timmer and recorded the time. My hypothesis was incorrect. Instead of Trident, Orbit lasted the longest. However
Have you ever wondered who invented bubble gum, or why it’s pink? How do you go about getting the answers to these questions? Easy. Think way, way back, not to prehistoric times but close, 1928.
Dependent variable: We are measuring the time taken for the pink indicator to turn clear when hydrochloric acid is added to it. Independent variable: We are changing the molar of hydrochloric acid we are adding to the gelatine cubes. The molars range from 1-3.
For this lab investigation, our question was do pillbugs prefer vinegar or plain water in their environment? Our hypothesis was that if they were given the choice, then they would choose the water side because their natural environment is not as acidic as vinegar. After we tested this hypothesis, the data that we collected over the course of 20 minutes supported our theory. At the end of the first minute, there were 3 pillbugs on the vinegar side, and 37 pillbugs on the water side. Then, after 10 minutes, there were 4 pillbugs on the vinegar side, 30 pillbugs on the water side and 6 pillbugs that were missing. After 15 minutes, 4 pillbugs were on the vinegar side, 28 were on the water side and 8 were missing. Finally, at the end of the 20th minute, there were 3 pillbugs on
Going into details of the article, I realized that the necessary information needed to evaluate the experimental procedures were not included. However, when conducting an experiment, the independent and dependent variable are to be studied before giving a final conclusion.
The Facial Recognition Lab was performed in order to determine whether or not the familiarity effect can be used to influence an individual’s memory. In the lab, ten Most Wanted faces were shown and the subject was asked to study them for an indefinite amount of time. Once they clicked “Next”, they were shown 20 faces in random order, ten of which were from the list they had just studied and ten were new faces. The subject was asked to determine which were new and which were Most Wanted. In theory this should be a relatively easy task, because the subject does not necessarily need to remember that a face was on the previous list, merely that they had seen it before. That it was familiar to them. Thus, on the second day they were shown 20 faces again. If the subject was randomly assigned into the control group, then they saw the Most Wanted faces mixed in with ten new faces. Otherwise they were assigned into the false memory group and were shown the exact same 20 faces they had seen the previous day. The subjects are given a “discrimination index” based on their level of accuracy. The hypothesis is that the control group will perform significantly better (i.e. have a higher discrimination index) than the members of the false memory group. This is because the control group still merely has to recognize a face. Granted they aren’t aware of which group they are in, but to the false memory group, all of the faces will have some degree of familiarity. They must go a step further and actually reconstruct which faces were on the Most Wanted list and which were not.
The purpose of this experiment is to determine the absolute configuration of an unknown chiral secondary alcohol using the competing enantioselective conversion (CEC) method. This method uses both R- and S- enantiomers of a chiral acyl-transfer catalyst called homobenzotetramisole (HBTM), in separate parallel reactions, and thin layer chromatography to identify the stereochemistry of the secondary alcohol, whether it be an R- or S- enantiomer. Quantitative analysis was performed using a program called ImageJ after the appropriate picture was taken of the stained TLC plate. The molecular structure of the unknown alcohol was identified using 1H NMR spectroscopy by matching the hydrogens to the corresponding peak.
In order to have a successful, reliable experiment you need sufficient data and evidence, reliable research, variables to test and a follow – up experiment. There are several types of variables you need to do an experiment. An independent variable is the manipulated experimental factor that is changed to see what the effects are. A dependent variable is the outcome. This factor can change in an experiment in reaction to the changes in the independent variable. An experimental group is the group of participants that are exposed to the change that the independent variable represents. The control group is participants who are treated in the same way as the experimental group except for the manipulated factor which is the independent variable (King 24). Proper data, evidence and research is also needed so the experiment turns out correctly and you know what you are testing. A follow – up experiment is not required, however it helps the validity of the conclusion of the experiment. Validity is “the soundness of the conclusions that a researcher draws from an experiment” (King 25). Conducting a follow – up experiment will help researchers and people alike see if the experiment worked properly, continues to help people and see how participants are doing after the experiment is over.
On the other hand, I will manipulate the concentration of lipase being added to the solution. I will change the volume of lipase. I will have 6 different concentrations of lipids as I would carry out 6 different experiments to gather a wide range of data. I would use concentrations such as 0cm3, 2cm3, 3cm3, 4cm3, 5cm3 and 6cm3. I would have a control group where I wouldn’t use lipase to see whether the pH change occurs due lipase or bile salt emulsifying the fat. I would use a control group to allow me to see the changes that occur in lipids between adding lipase and not adding lipase.
Abstract: Marshmallows have more Calories per gram. Marshmallows have .2079 J/g℃ and cheese puffs have 1.08x103 J/g℃. My hypothesis was that marshmallows have more Calories per gram and my results confirmed my hypothesis because there is a .2068 J/g℃ difference.
Dependent Variables Amount of vitamin C in fruit juices. Controlled Variable Same amount of liquid for each fruit juice.... ... middle of paper ... ...
A confounding variable (or an extraneous variable) is an outside influence, separate from the independent variable, that changes the outcome/effect of the dependent variable. Researchers (usually) cannot control confounding variables; consequently, it is possible that confounding variables may impact research in ways the researcher desires, or even in ways that are undesired. Confounding variables majorly impact experimental conditions and outcomes, yet it is almost impossible to prevent them.
That is because one variable is depended on the other variable. For this experiment the independent variable is the stereotype threat of being a woman. The dependent variable is math performance test. This all would explain that a math score whether it high or low. That is would tie into a women that has taken the test and how she performed on the test. The score would explain that a women will be judge on that score which is the stereotype of this article that women perform low on the math test. The test is called the Graduate Record Examination (GRE) and it is a timed test that is 20 minutes. With 30 multiple - choice questions to be answered. Which give the experimenters their