The purpose of this experiment was to make a conclusion on why Mr. R’s lawn was turning yellow, and dieing around his drainage pipe. In this experiment there were different lab groups that tested out different chemical products, that would be washed down a drain. There was a wide assortment of products that were tested in this experiment, for example, windex was one of the products being tested. On our experimental days, we would take our product, and add it to the water supply of our grass. My lab group experimented with windex. Our hypothesis was, if windex was added to the daily water supply of grass, then the grass will turn yellow and die because of the chemicals in the windex. Our hypothesis was rejected because, our grass didn’t
The hypothesis to this experiment is "if you place a plant under water in direct sunlight, then it will produce oxygen bubbles." In this experiment the independent variable where the plant is placed. The dependent variable is the water the plant is put in. Your controlled variable would both be the type of water used and the type of plant used. The conclusion to this experiment would still ben your hypothesis because its true which is " if you place a plant under water in direct sunlight, then it will produce oxygen bubbles." The only flaws in this experiment were that they used the same type of water and they did not try any other water. I believe that this experiment is
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.
Following directions, paying attention, and being careful were the harder tasks. Before one starts any experiment, it is important to always be cautious and use safety first. Even though Professor Demor gave each of the eleven groups an opportunity to create their own experiment, there were specific rules each of us were still required to follow. Each group was required to use a minimum of ten duckweed plants. We were also required to use a maximum of 50 ml of solution of our choice. Lastly, professor gave us a maximum of nine cups for replication. We did not have to use all nine, it was up to us. Every group was different, but this is what our group experimented. Our group decided to see what effect high phosphate and nitrogen levels had on the growth of duckweed. The phosphate level was 100 ppm and the nitrogen level was 1760 ppm. As a group we set up three replicas cups with 50 ml of solution and one cup with 50 ml of regular pond water. After filling the cups with the right amount of solution, we took the duckweed out of the original container, using a _________ and placed it into the proper cups. In order to see a major difference amongst duckweed growth, we used 10 duckweed plants per cup, most having only 1-3 fronds. After that, we labeled the cups properly. To stop contamination, all cups were covered with plastic wrap and was securely held down with a rubber band. Lastly, once everyone finished, we were asked to place
The test is to see if spinach leaves discs can be effected by photosynthesis. I predicted that more disc would float in the light than in the dark. After writing down my hypothesis, I put the discs in water on a petri dish and waited 15 minutes. I then recorded if the in the light were floating or not. I also found out that the disc will also change color when they are in the light or in the dark. The hypothesis is supported when the light does have more disc floating in the petri dish than the dark did. I also determined other things as well such as the the dependent and independent variables, and the control treatments. The independent variable is the amount of oxygen in the discs. The dependent variable is the light, darkness, and the amount
Fair test: To make this experiment a fair test, I will set out a table
In the Macromolecules lab we tested for different thing such as reducing sugar, starch, and protein. In the reducing starch experiment we tested three different macromolecules. Each macromolecules was tested for sugar and how we indicated how much sugar was in each macromolecules was because the color would change. Some of the colors it would change to would be light blue (no sugar), light green (a trace of sugar), yellow (low sugar) Orange (moderate), red orange (high). Seven tubes were tested that had 10 drops of a different liquid such as onion juice, potato juice, sucrose, glucose, distilled water, reducing sugar, and starch solution. In the Iodine starch test water, starch, milk, tofu, and apples was tested. The blue indicated
experiment because the outcome of an experiment is not predicted on the basis of a single
All in all, this was a very fun and hands on experiment. The abiotic features, such as, the water and the soil, had drastic changes to them as well, and the biotic features; such as, the wheat grass and the anacharis plant, were majorly affected in this experiment, our hypothesis was that we thought that we could neutralize laundry detergent, vinegar and distilled water, so that there won’t be any difference in the growth of the wheatgrass, and the health of the anacharis plant between the control bottle and the two test bottles. We were also observing if one type of vinegar/laundry detergent solution polluted the water more that the other. We made the prediction that the white vinegar would pollute that water more because apple cider is made from more natural substances. My group and I were incorrect, about our hypothesis, but the prediction about the pollution was correct. Both of the wheat grass plants from both of the test columns eventually died.
Control conditions are crucial in this experiment because there needs to be two different groups to test the hypothesis; a control group and an experimental group. The two groups
The objective of this project is to use afterimages to investigate color perception in the human eye. Afterimages are the sights you see whenever you stare at a light for too long. Everybody has probably experienced an afterimage. The hypothesis of this experiment is if you look at a bright image for 5 seconds, then the afterimage will be 9 seconds because the afterimage always lasts longer than the amount of time you stare at the image. The control of this experiment is staring at the red image for 5 seconds. The independent variable is how long you stare at the image. The dependent variable is how long the afterimage appears.The constants of this project will be the same light and image and the same eye.
In our experiment, we are testing the affects sodium has on our blood pressure. If increased amounts of sodium are consumed, will that increase blood pressure? The hypothesis is when more sodium is introduced and consumed, then the person's blood pressure will increase, when blood pressure is a function of sodium. Our independent variable is different amounts of sodium introduced to noodles. We are using different amounts of sodium added which would be: 1 gram, 3 grams, 5 grams, and 7 grams. Our dependent variable is the diastolic and systolic readings will increase. The control in our experiment is our test subjects eating no noodles. The constants would be the same person taking the blood pressure, same three guys eating the food, the test subjects are all 17, and the same food with added sodium fed to each person in each trial. In this experiment, the first step we would took in this was acquiring three guys that are all 17 . One person would get high amounts of sodium, another person would have medium, and one person with very low amounts of sodium, our control. Then, we would take each person blood pressure and record it. After that we would give each person their assigned amount of sodium. Lastly, we would take the blood pressure of each person after they ate the different sodium foods. We will do this for two weeks three times a week and record our data and at the end compare our data. The materials we will need
There is also the potential of human error within this experiment for example finding the meniscus is important to get an accurate amount using the graduated pipettes and burettes. There is a possibility that at one point in the experiment a chemical was measured inaccurately affecting the results. To resolve this, the experiment should have been repeated three times.
LAB REPORT 1st Experiment done in class Introduction: Agarose gel electrophoresis separates molecules by their size, shape, and charge. Biomolecules such as DNA, RNA and proteins, are some examples. Buffered samples such as glycerol and glucose are loaded into a gel. An electrical current is placed across the gel.
The experimenters manipulate the independent variable and examine whether there is any effect on the dependent variable. The dependent variable depends on the independent variable.
The study will include 60 first grade students that will be randomly selected and divided into two groups for this experiment. There will be a control group and an experimental group consisting