The scientific question that was investigated in this experiment is: Does the material used in a filter affect the amount of salt that passes through a filter? The hypothesis was that if the saltwater was run through the different materials listed, then the charcoal filter would filter the most salt out of the water. The independent variable in this experiment is the type of material used in the filter and the dependent variable is the amount of salt left in the filtered water. Some control variables in this experiment are the amount of water and salt poured through the filters, the size/area of the filters, and the brand of coffee filters used in the filters. Others control variables in this experiment include: the length of time that the …show more content…
The cotton ball filter left the least amount of salt in the filtered water. It’s trials averaged only 8.67 grams of salt left in the water. The water with the next lowest salt content is the water that came from the sand filter. The filter filled with sand let a mean of 13.3 grams of salt pass through it. Its trials have a range of 0.5 grams. The filters with the third lowest salt content in the water that passed through it are the charcoal filters. The charcoal filters took the longest to filter salt water through. However, the trials using the charcoal filter had an mean of 13.73 grams of salt remaining after the water had been filtered. The range of the trials was 1.3 grams. The filter with the highest salt content in its filtered water is the filter with sponges in it. The filters with sponges in them let the salt water pass easily through them. The mean amount of salt that passed through the sponge filters is 14.03 grams. The range was 1.4 grams. The mean amount of salt left after boiling the saltwater that did not go through a filter (the control group) is 15.5 grams and has a range of 0.5 grams. Overall, I observed that the more dense the materials in the filters, the less salt passes through
This experiment is used to determine the effect salt has on plant germination. In my scientific opinion, there will be a more dramatic increase of growth in the NaCl 0% out of the four solutions because it’s considered as distilled water which doesn’t increase or decrease the soils osmotic pressure, this way it’s a natural growth instead of being enhanced by NaCl different concentration levels.
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
In order to overcome gas grill penetration, the KC should organize an advertising campaign on and emphasis on charcoal market advantages versus gas market with an aim to increase total charcoal grill market, using results of blind taste test of food grilled on charcoal comparing to grilled on gas.
In this report, we will be analyzing the current performance of Kingsford in the marketplace and identify the main cause of revenue deterioration. Thereafter, a comprehensive strategy and marketing plan will be presented.
My hypothesis for the penny cleaning with the chemicals experiment was accepted. The hypothesis was; “If a penny is placed in salt and vinegar, then it will get cleaner than the other chemicals being used”. The data used from the experiment that supports the hypothesis was that the salt and vinegar chemical cleaned a penny the best it had a 90 out of 100.
What are the effects of different solutions on the size of a cell? To find a solution this problem my group conducted an experiment/lab. The variables changed (Independent Variable) were the solutions, and the results were the change in size of the gummy bear/cell (Dependant Variable). The control group,to compare our results, was a gummy bear that was not put into any solution. The standardized variables were the color of the gummy bear, the same brand of cup, the amount of solution in each cup, and the amount of time each gummy bear spent in the solution.
Have you ever thought about the preparation and thought that goes into a research experiment? There are many things to consider when planning a study, such as the questions you are trying to answer, the variety of participants that will be studied, and the different variations in the experiment. An important part of the experiment that can have a significant impact on the results are the variables chosen. In doing this, the researcher can easily tell what factors have an effect on the topic under study.
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.
Evaluation: If this experiment was to be redone then more diverse oceanic life would have to be used playing different roles in the water. The experiment performed showed a small projection of the ocean’s course if pH levels rise but by adding more confounding variables then maybe the outcome may have been different. If another researcher is to replicate this experiment it is optimal if they did several different trials to see if the same result occurs like the one just performed.
The independent variable within the experiment was the presence of pollution content such as pH, dissolved oxygen, nitrate and phosphate level. This was varied by locating two areas, one with + %(have to include 5) polluted water stream beside road and another without notified pollution which is church stream.
The information gained may support or yield opposite results based on predictions being tested. My independent variable would be time and the dependent one would be the enzyme pectinase. I believe the key feature of my experimentation is the control of most factors so that the influence of a single factor can be seen clearly.
In order for an experiment to be considered a true experimental design, the design must fit specific criteria. The researcher must have a hypothesis for a cause and effect relationship between variables, the treatment group, the control group, random selection for the treatment group, and random assignment for the control group. In a simple experiment, the researcher forms two groups that are similar or equivalent, through probability, to each other in every way possible appropriate to the concept of experiment. The treatment group receives the procedure for the experiment and the control group does not. Therefore, the only difference between the groups will be that one group receives the treatment for the experiment and one group does note. After the experiment is conducted the researcher analysis the results in both groups.
The design for this study will be a simple between subject experiment consisting of one experimental group and one control group. The independent variable will be warm colors. The dependent variable will be mood. The main goal is to determine if the independent variable will influence or cause difference in the specified dependent variable. The experiment group will spend 60 minutes in a warm paint color room and their mood will be measured. The control group will spend 60 minutes in a neutral paint color room and their mood will be measured.
In the cognitive level of analysis, the most common research method would be lab experiments. Lab experiment is the only research method that shows cause-and-effect relationship between variables. It takes place in a laboratory or an artificial environment. The researcher would manipulate the IV and controls all the other variables, in order to avoid confounding variables. There is also a controlled environment and standardized procedures. There are three main strengths for this research method. First of all, it can establish cause-effect relationships. Secondly, there is variable control and accuracy of measurements, which indicates objectivity. As for the third strength, lab experiment is easy to replicate, thus increasing the reliability of results. On the other hand, three evident limitations can be observed. The first one would be artificiality, which may result in lack of ecological validity. Demand characteristics and experimenter effects contribute to biased results, w...
In short, we can recall that the hypothesis is sodium chloride increases the swimming behavior of the Paramecium tertaurelia. Our |t-calculated|, as shown in Table 2, is less than the t-critical value from the table, therefore our averages for both the experimental group and control group are not significantly different enough, statistically speaking. As a result, our hypothesis is not supported. In this case, we accept the null hypothesis, which states that the sodium chloride has no effect on the swimming speed of the Paramecia tetraurelia and it is thus, supported. According to the results for the t-test, our t-calculated is less than the t-critical; therefore, we are less than 95% confident that the swimming speed increases. These results