Carefully examine the relative positions of the lettered arrows on the timeline below and estimate the ages represented by each arrow. Use the chart to answer this question.
Which represents the extinction of the dinosaurs?
A. A
B. B
C. C
D. D
E. E
F. F
Answer: A
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Which of the following is a measuring device that is used in order to produce a sounding?
A. radiosonde B. barograph C. psychrometre D. thermometre
Small suspended solids and liquids are called
A) precipitation. B) particulates. C) smog. D) all of these
What is the one of the two styles of wooden door frames?
a. rabbet b. ledge c. barn d. finger joint
Although your sister is not a scientist, she says that she uses scientific techniques in her everyday life. You do not believe her but she insists it is true. Which of the following examples could she use to best persuade you?
A. When she cooks, she measures ingredients and puts them together to form something else (e.g., a cake) B. When she drives in her car, she hypothesizes about things (e.g., when the red light will turn green) C. She buys a brand of toothpaste based on statistical data (four out of five dentists recommend it) D. She put some tomatoes in the sun and some in the shade to see if the sun causes them to ripen faster E. All of these are examples of using scientific techniques in her everyday life