Nursing Entrance Exam

Chapter 9: General Sciences (TEAS ONLY) 9.1 The Scientific Method The scientific method is a set of steps which allows individuals who ask “how” and “why” questions about the world to go about finding valid answers that accurately reflect reality. Were it not for the scientific method, people would not have an effective method for drawing quantifiable and accurate information about the world. Here are the four primary steps of the scientific method: 1. Analyzing an aspect of reality and asking “how” or “why” it works or exists 2. Forming a hypothesis that explains “how” or “why” 3. Making a prediction about the sort of things that would happen if the hypothesis were true 4. Performing an experiment to test your prediction Observation and Analysis The first step in the scientific method requires you to determine what it is about reality that you want to explore. You might notice that your friends who eat regular servings of fruits and vegetables are healthier and more athletic than your friends who live off red meat and meals covered in cheeseand gravy. This is an observation and, noting it, you may ask yourself “why” it seems to be true. At this stage of the scientific method, scientists will often do research to see if anyone else has explored similar observations and to analyze the findings of others. This is an important step, not only because it can show what others have found to be true about their observation, but because it can showwhat others have found to be false, which can be equally as valuable. Hypothesis After making your observation and doing some research, you can form your hypothesis. A hypothesis is an idea you formulate based on the evidence you have already gathered about “how” your observation relates to reality. Using the example of your friends’ diets, you may have found research discussing vitamin levels in fruits and vegetables, and how certain vitamins will affect a person’s health and athleticism. This research may lead you to hypothesize that the foods your healthy friends are eating contain specific types of vitamins, and it is the vitamins that are making them healthy. Just as importantly, however, is applying research that shows hypotheses that were later proven wrong. Scientists need to know this information, too, as it can help keep them frommaking errors in their thinking. For instance, you may come across a research paper in which someone hypothesized that the sugars in fruits and vegetables gave people more energy, which then helped them be more athletic. If the paper continued to explain that no such link was found, and that the protein and carbohydrates in meat and gravy contained far more energy than the sugar, you would know that this hypothesis was wrong and that there was no need for you to spend time exploring it.

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