The purpose of this experiment is to conduct what happens to gummy bears when we put them into different liquids. When we were done we gathered data and saw that the gummy bears ended up with different textures and sizes. There were only some minor differences. For water after a day, the length changed, the width, height, and mass. For salt water only the mass changed, before it was 2.6 and after it was 1.5 grams. The next liquid is sugar water, and for that liquid all the of the data changed. The length was 3 cm before, after it was 3.5 cm. The width of the gummy bear was 3 cm before, after it was 1 cm, and after it was 1.5 The height was 2 cm, and changed to 1 cm. Lastly is the mass, it was 2.6 and the after it changed to 5.1. The
In this lab experiment our main focus was to get skillful in using tools such as the metric ruler, balances, thermometer, and graduated cylinder to capture measurements of length, mass, temperature and volume. Additionally, this lab helped us to become more familiar with the uncertainty of measurements, as well as becoming efficient with rounding our measurements to the correct numbers of significant figures. Our results are measured consistently with rounding to the closest answer we could possibly acquire as the data can tell you.
The independent variable in the experiment was the mass (or amount) of the cheese and bacon balls.
My problem question was, “What happened to the mass and the volume when I dropped an egg in vinegar, corn syrup and water for 24 hours?” To answer this question, you would have to follow the procedures. You need to carefully handle the egg. If you drop it, the the data will be incorrect. Drop the egg in different types of liquids (water, vinegar, and corn syrup) and let them sit there for 24 hours. The next day, record the mass and volume of the egg and different qualitative observations. At the end of this lab, I knew that the procedure did answer my problem because by putting the egg in different liquids, I knew that the results would be different. The answer to the problem question is the mass and the volume changed based on the different
The purpose of this experiment was to test multiple brands of popcorn under the same setting in order to conclude which one statistically popped the most kernels. I tested the butter flavor of Orville Redenbacher, Wal-mart’s Great Value brand, and Pop Weavers. The different bags of popcorn were popped in the same microwave for the same amount of time, 3 minutes and 15 seconds. Then, the popped corn was counted, as well as the un-popped kernels, in order to determine a ratio, and then I recorded the results in the data table. I repeated these steps two more times for a total of 3 trails for each brand. Then I compared the ratios of all the bags to determine which brand yielded the most popped corn. The statistical technique used to evaluate the data was to find a ratio between the number of kernels in the bottom of the bowl and the number of popped kernels. To find this, I divided the number of the actual popped corns by the total number of kernels left in the bottom of the bowl. The ratios and percent were then compared. Once all my results were in the data table, I averaged the 3 trials for each brand of popcorn.
The scientific question of the project was, Does the size of a tire affect the bike’s speed? The hypothesis was , If the smaller tires were used, then the bike would go faster. The important procedures were: Make sure all equipment is ready. Test the standard wheel of 1 rotation or pedal a second to ride to the finish line. Test smaller and bigger wheels. Record data and have at least 3 trials. Record the data on a piece of paper and compare results to your hypothesis. The Independent variable is the size of the wheel on the bike. The Dependent variable is the standard wheel or tire on the bike. The control group was the bike’s speed and the standard wheel or tire. The Experimental group is the other tires or wheels being tested on the bike. The control variables were the rate of pedaling , the same bike model was used, and the same distance for
Human error is easily obtained when working on an experiment with so many different solutions, time measurements, and accuracies of measurements. An easy mistake could have been made while waiting 15-20 minutes for the Carb Cutter to digest. With the time crunch in the Biology Lab, the Carb Cutter may not have been completely digested before rushing to begin the experiment. The results from the experiment showed an increase in absorbance with the Carb Cutter pill, which is not accurate because there is no way that more starch was made in the solution. Given more time for the procedure, this lab experiment may have received more accurate results.
f. The student is conducting a nutrition experiment using lab rats. One group (control group) is fed a normal diet, while the other group (experimental group) is fed a diet high in protein. There were 30 rats total used in the experiment. At the end of the experiment, the average mass (weight) of a rat in the control group was 60.4 g while the average mass (weight) of a rat in the experimental group was 0.0689 kg. What is the average difference in weight between the two groups in grams?
To exemplify, when we were measuring the initial mass for the potato to be put in the 0.4M solution, 25.60 g came up the most, however, other masses between 25g to 27 grams came as well. Relating to this, for the final mass of 0.8M first appeared as 20.47 g but then it kept on changing from 21 to 23 g. Nevertheless, we guessed this may have been more accurate because it was the one sensed most immediately and on top of that we were confused on which one to pick. Therefore, when just had to pick the number that showed up the most often or first appeared at times during the process. Hence, our initial and final masses of the potato may have been slightly off.
The purpose of this lab was to determine if lima beans would be able to grow nice and big in gatorade. The hypothesis stated, if we put the lima bean in the gatorade then it will grow really big, fast because gatorade contains of electrolytes that might affect the lima beans growth. The hypothesis turned out to be disapproved because the lima beans average length in the water/ control starting from day 1 was 17.5 mm, 25.4 mm, 42mm, and 44mm. The lima beans average length in the gatorade was 17mm, 22.6mm, and by day 3, the lima beans grew mold. In addition to that, The total mass of the lima bean in the control was greater than the bean in the variable. The lima bean in the control’s total mass was 5.25g, 9g, 11.9g, and 20.5g. The lima bean
Controls- The control in this experiment was very important because if it was not contained, then the data would have been faulty. It was very difficult to keep
There could have been several variables that could have affected the results of this lab. One would have been if the salt measurements were incorrect. If more or less salt was added than realized, this would have caused the results to be incorrect. Another variable could have been the size of the potatoes being measured incorrectly. If
The independent variable of this experiment were the different types of the solutions used, while the dependent variable was the mass of the cucumber slices. The constants were, the amount of liquid used and the time the cucumbers were left in the solution. While the control was the cucumber left in the cup with no solution. The students made a hypothesis saying that they believe that the cucumber slices put into the salt solution would decrease in mass while the cucumber put in the distilled water would increase in mass. In the end, the results of the experiment supported the students
The independent variable was the amount of motor oil in 2% salt solution because it is the variable that was being tested and purposefully manipulated. The dependent variable was the hatching viability of the brine shrimp tested (which was calculated by adding the number of brine shrimp swimming at 24 hours to the number of brine shrimp swimming at 48 hours, and then divided by the total number of eggs initially placed in the petri dish). The control group was a petri dish of brine shrimp in 30 ml of 2% salt solution with no motor oil. The constants, or variables that need to be controlled, were the salinity percentage of the salt solution (2%), the amount of salt solution in each petri dish (30 ml), the total time the brine shrimp were left in the petri dishes (48 hours), and the frequency of when the brine shrimp were checked (every 24 hours).
The hypothesis stating if four grapes are placed in distilled water, a salt solution, a sugar solution, and tap water, then the grape placed in distilled water will gain the most mass out of the four grapes was rejected by the data. The grape placed in the distilled water gained the second smallest amount of mass in the experiment, 0.26 grams. The hypothesis stating if four grapes are placed in distilled water, a salt solution, a sugar solution, and tap water, then the grape placed in the salt solution will lose the most mass out of the four grapes was rejected by the data. The grape placed in the salt solution gained a mass of 0.22 grams. The grape placed in the salt solution gained 0.22 grams of mass, the grape placed in distilled gained 0.26 grams of mass, the grape placed in the sugar solution gained 0.55 grams