Science can be defined as a systematic approach to acquiring knowledge. Science is based upon facts and evidence rather than beliefs or superstitions. To understand Biology and science, you must first examine how scientific knowledge is obtained. Science is a process that involves several steps. Read the description of the steps involved in the scientific method in the text paying close attention to the steps outlined in Section 1.3. Then pick one of the examples below and describe the steps of the scientific method you would use to test the question or find the solution to the problem. In other words, please design a virtual experiment (using the steps of the scientific method) to test the hypothesis you make about one of the questions listed below.
Be sure to identify the steps (observation, hypothesis, prediction, experiment/test, controls, results, conclusions). In your responses to each other, help each other identify the parts of the process properly so that the results can be clearly interpreted.???
- Will chilling an onion before cutting it keep you from crying?
- If you shake up different kinds or brands of soft drinks (e.g., carbonated), will they all spew the same amount?
- Do all breakfast cereals that say they have 100% of the U.S. recommended daily allowance (RDA) for iron really have the same amount?
- Are all potato chips equally greasy (you can crush them to get uniform samples and look at the diameter of a grease spot on brown paper)? Is greasiness different if different oils are used (e.g., peanut versus soybean)?
- Does eating breakfast have an effect on school performance?
- Do the same types of mold grow on all types of bread?
- Does increasing the ethylene concentration ripen fruit more quickly?
- Can you use a household water filter to remove flavor or color from other liquids?
- Does the power of a microwave affect how well it makes popcorn?
- Can you tell/taste the difference between ground beef, chuck, and round after they have been cooked?
Will Chilling an Onion Before Cutting it Keep You From Crying?
Observation
When one cuts a chilled onion, it does not cause them to tear. However, when one cuts up a fresh onion that is at normal room temperature, the eyes cry.
Hypothesis
Cutting an onion in different temperatures will determine whether one breaks into tears or not.
Prediction
When one cuts an onion in normal temperature, it will cause one to tear. When one chills the onion before cutting, it will not cause them to tear.
Experiment
In the first test, an onion is placed in a room at normal temperature for thirty minutes. It is then cut and observations are made on whether it causes one to cry. In the second test, an onion is placed in a refrigerator for thirty minutes and then cut. Observations are made on whether it causes one to cry.
Control Experiment
A third onion is placed in heated water for thirty minutes and it is then cut and an observation is made on whether it causes one to cry.
Results
The first onion that was placed in a refrigerator does not cause tearing when cut. The one that is placed in heated water also doesn’t cause tearing. The onion that is cut in its normal temperature causes a person to cry.
Conclusion
Cutting the onion causes a chemical reaction in the onion that releases syn-propanethial-S-oxide, which irritates the eye and causes it to cry. Altering the temperature of the onion by cooling slows down the reaction within the onion that releases syn-propanethial-S-oxide that causes the eyes to tear. Heating up the onion destroys chemicals within the onion and therefore the chemical reaction that releases syn-propanethial-S-oxide which causes crying (Education.com, 2017).
