General, Organic, and Biological Chemistry: Structures of Life (5th Edition)

Published by Pearson
ISBN 10: 0321967461
ISBN 13: 978-0-32196-746-6

Chapter 1 - Chemistry in Our Lives - 1.2 Scientific Method: Thinking Like a Scientist - Questions and Problems - Page 6: 1.7


a. observation ( O ) b. hypothesis ( H ) c. experiment ( E ) d. observation ( O ) e. observation ( O ) f. conclusion ( C )

Work Step by Step

a. Chang DETERMINED that sales of the house salad had dropped. The key word here is "determined". He observed that the sales of the house salad had dropped. b. Chang DECIDED that the house salad needed a new dressing. The key word here is "decided." Because he decided he needed a new dressing, he is proposing a hypothesis. He asked himself the question "how can I make this better?" and came up with the idea that he needed a new dressing. c. In a taste TEST, Chang prepared four bowls of lettuce, each with a new dressing: sesame seed, olive oil and balsamic vinegar, creamy Italian, and blue cheese. The key word here is "test." Any type of test is automatically going to be an experiment. d. The tasters rated the sesame seed salad dressing as the favorite. This one is a little tricky because it seems like a conclusion, but really he observed that the tasters had liked the sesame seed salad dressing as their favorite. e. After two weeks, Chang NOTED that the orders for the house salad with new sesame seed dressing had doubled. The key word here is "Noted". He noticed that the orders had doubled, and when you notice something it is an observation. f. Chang decided that the sesame seed dressing improved the sales of the house salad because sesame seed dressing enhanced the taste. This is a conclusion because the results of Chang's experiment are analyzed. He analyzed his results and concluded that because he changed the salad, more people bought the salad.
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