Day 7 -- All Out Attack

So, who took Jerell's Ipod?
This class period was consumed by a massive evidence analysis experiment to figure out who took an Ipod, based on samples left at the imaginary crime scene. The tests involved the finding of starch, glucose, lipids, and proteins. Using the same methods we have in the past, we figured out the results. 

We began by predicting the foods that belong to groups of organic compounds. (For example, fish and steak would belong to the protein category, and bread and rice to the carbohydrates.) There were then tests of vegetable oil, glucose, potato starch, egg whites, and water to place them in the categories previously mentioned. 

Brown bag tests of the original substances to find lipids.

To find evidence of lipids, we placed each of the foods on pieces of brown paper bag. Those that left an obvious mark, or bled through leaving a transparent surface, contained lipid. The oil, which was predicted to contain lipid, tested positive. All others tested negative. 

Then, we tested for carbohydrates, or glucose in this experiment. As we are known to do, we altered the experiment by testing via Benedict's solution. It was revealed that there was glucose present in the glucose. (This sentence is completely unnecessary and redundant, but I thought it should be included anyway. Any logical thought process would reveal this.) But there were negative tests for all the others. 

• Starch test (Iodine) - Present in starch
• Protein test (Biuret) - Present in Egg whites
• Lipid test (Bag) - Present in Vegetable Oil
• Glucose Test (Benedict's) - Present in Glucose

We then were to test certain foods for the presence of these four, which included a pretzel, butter, jelly, fat-free yogurt, and beans. The tests for the five resulted as predicted, with the butter containing lipids, the jelly containing glucose, etc. Once we received outcomes for each, we could associate the foods with the different categories based on their positive test results.

Results from the food and evidence tests.

The evidence, which was clearly the most important part of the experiment, came last. We tested liquid and solid parts of the evidence, each producing a different result. The dry contained carbohydrates, while the liquid contained proteins and lipids. Since not many drinks are known for containing lipids besides dairy products, it pointed us in the right direction in solving the crime. 

Taking a look at the suspected suspects, the closest match to the contents of the evidence was Jose, who was eating a bean and cheese burrito at the time. Since it contained both protein and lipid (but lacked starch, which was found in the evidence), the burrito somewhat matched the evidence. We accused Jose, and found that he was the culprit.

Note to Experiment Composer:

I find the fact that Jose is eating a bean burrito in the experiment to be slightly racist. In addition, he was found as the culprit, which backs up my point. Next time, there should be fewer accusations of culture, and more of thieves.