A bicycle pump contains air at one atmosphere and 0°C. As the tire is pumped up, the volume of air decreases by 50% with each stroke. What is the new pressure of air (in atm) in the chamber after the first stroke, assuming no temperature change?
a. 2
b. 1
c. 0.5
d. 0.1
e. 3
A
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In its most energetic phase, a quasar can probably only last:
A) a few days. B) a few years. C) a few thousand years. D) a few million years. E) a few billion years.
. 
The multicolored ring in the image above of Earth is a/an ___________.
a. impact site under the water, falsely colored.
b. tornado
c. hurricane
d. aurora
The larger the diameter of a telescope, the more light it will collect
a. True b. False Indicate whether the statement is true or false
Which of the following supports the idea that the Martian crust is not divided into moving plates like those on Earth? I. the size of Olympus Mons II. the lack of folded mountain chains III. the lack of rift valleys outlining entire plates IV. the presence of dry river beds and sea floors
a. I & II b. II & III c. II, III & IV d. I, II, & III e. I, II, III, & IV