Support Materials for CCA Version 4.0—Reading
Draft – February 2006
11. The Sumerians chose 60 as the base for their number system because
A. there are 60 minutes in an hour.
B. they invented dial clocks.
C. 60 can be divided easily.
D. there were six sacred directions on the Sumerian compass.
12. The author says that using dial references when viewing objects under a
microscope helps to show the
A. position of an object.
B. time that the object is observed.
C. frequency of appearance of the object.
D. duration of time that the object is evident.
13. Which feature of a dial clock do astronomers use to define Earth’s rotation?
A. its numbering system
B. its direction of hand movement
C. its relationship to a compass
D. its movement over time
14. The author concludes that in the future
A. only scientists will use dial clocks.
B. new clock terms will be invented.
C. the clock problem will continue.
children will learn to count differently.
Discuss three arguments that the author uses in trying to convince the reader
that dial clocks are better than digital clocks.
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