Chapter 1: Q. 1.32 (page 22)
A "chemical-free" sunscreen includes the following ingredients: titanium dioxide, vitamin, and vitamin. Is the sunscreen truly "chemical-free"?
The sunscreen is not truly "chemical-free".
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Classify each of the following as an observation, a hypothesis,
an experiment, or a conclusion:
a. The bicycle tire is flat.
b. If I add air to the bicycle tire, it will expand to the proper size.
c. When I added air to the bicycle tire, it was still flat.
d. The bicycle tire has a leak in it.
Identify each activity, a to f, as an observation, a hypothesis, an experiment, or a conclusion. At a popular restaurant, where Chang is the head chef, the following occurred:
a. Chang determined that Customers rated the sesame sales of the house salad seed dressing as the best. had dropped.
b. Chang decided that the house salad needed a new dressing.
c. In a taste test, Chang prepared four bowls of lettuce, each with a new dressing: sesame seed, olive oil, balsamic vinegar, creamy Italian, and blue cheese.
d. Tasters rated the sesame seed salad dressing as the favorite.
e. After two weeks, Chang noted that the orders for the house salad with the new sesame seed dressing had doubled.
f. Chang decided that the sesame seed dressing improved the sales of the house salad because the sesame seed dressing enhanced the taste.
Solve each of the following for :
a..
b..
Identify each of the following as a physical or chemical property= (3.2)
a. Gold is shiny.
h. Gold melts at .
c. Gold is a good conductor of electricity.
d. When gold reacts with sulfur, a block sulfide compound forms.
Identify each of the following as an observation, a hypothesis, an experiment, or a conclusion:
a. Sally thinks she may be allergic to shrimp.
b. Yesterday, one hour after Sally ate a shrimp salad, she broke out in hives.
c. Today, Sally had some soup that contained shrimp, but she did not break out in hives.
d. Sally realizes that she does not have an allergy to shrimp.
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