I did this experiment and I found these validity issues: they never specified if temperature to be measured in celcius or faren., they never mentioned that the buckets were to be the same, stirring until your arms get tired is not a good idea, but I need three more validity issues?????
DO you consider the companys conclusion valid? How could them improve?
To prevent future brownfield sites the DEP's concer lies in the fact that the chemical in the wastewater eventually reaches natural waterways and affects drinking water. It decided to test the temperatureeffects of a chemial to the natural water that could be contaminating.
Their experiment was based on this statement: We are trying to determine if adding chamiall X to stream water causes the stream water to rise in temperature.
HEre is the procedure:
1. Take two buckets and fill each one about halfway with tap water.
2. Record the temperature of each bucket of water.
3. Put a shovel full of chemical into bucket number 1 and stir until arms get tired. Record the temperature.
4. Put 2 shovel fulls in bucket number two and record temperature.
So it again for accurate results.
Graph and make conclusion
In one bucket the temperature increased from 15 to 35 degrees and in the other bucket the temperature increased from 15 to 37 degrees. They concluded the chemical was responsible for temperature rise.
Thank you for using the Jiskha Homework Help Forum. First of all WHERE did the experiment come from? Who are THEY? If it came from your textbook, where was it published? If it came from a U.S. site, you can count on F. for the last two.
We need more information to assist you here.
i got this from my teacher and i have to find validity issues for it.
"They" is the company that did the experiment
PS I had to do this too but i don't remember it sorry
Based on the information provided, here are three additional validity issues with the experiment:
1. Lack of control group: The experiment did not include a control group, which is essential to compare the results against a baseline. Without a control group, it is difficult to determine if the observed temperature increase is solely due to the chemical or if it could be attributed to other factors.
2. Inconsistent measurement units: While the experiment stated to record the temperature, it did not specify whether it should be measured in Celsius or Fahrenheit. This inconsistency in measurement units presents a validity issue because it can affect the accuracy and reliability of the temperature readings.
3. Unclear mixing procedure: The experiment mentions stirring the bucket until "arms get tired," which is not a precise or standardized method of mixing. This lack of clarity in the mixing procedure makes it difficult to replicate the experiment accurately and raises doubts about the consistency of the results.
Considering the validity issues mentioned, it is important to note that the company's conclusion based on this experiment may not be entirely valid. To improve the experiment and strengthen the validity of their conclusions, the company can consider the following adjustments:
1. Include a control group: To accurately determine the effect of the chemical on temperature, the experiment should include a control group with water-only (no chemical added). This will help assess if any temperature rise observed in the experimental groups is solely due to the chemical addition or other factors.
2. Specify measurement units: To ensure accuracy and consistency, the experiment should clearly state whether temperature measurements should be recorded in Celsius or Fahrenheit. This will enable proper comparison and interpretation of the temperature changes.
3. Standardize the mixing procedure: The experiment should provide a detailed and standardized method for stirring or mixing the chemicals in the buckets. This can include specifying a certain duration or number of stirs, or using mechanical mixing equipment, to ensure consistency in the mixing process.
By addressing these validity issues and making the suggested improvements, the company can enhance the reliability and validity of their experiment, leading to more robust conclusions about the temperature effects of the chemical in the stream water.