The reddish particles in Jupiter's ring are less than 1 percent as reflective as Saturn's whiter particles. Saturn's ring particles are thought to be ____________while Jupiters are thought to be ____________
a. icy; rocky
b. rocky; icy
c. icy; also icy
d. rocky; also rocky
a
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__________ in Earth's atmosphere absorbs most microwave and infrared radiation coming from outside Earth's atmosphere
a. Ozone b. Water vapor c. Methane d. Carbon dioxide
Suppose we wanted to represent all of these objects using the 1-to-10-billion scale from Chapter 1, on which the Sun is about the size of a grapefruit. Approximately how large in diameter would the star Aldebaran be on this scale?
A) 40 centimeters (the size of a typical beach ball) B) 6 meters (roughly the size of a dorm room) C) 15 meters (roughly the size of a typical house) D) 130 meters (slightly larger than a football field)
The principal greenhouse gases in our present atmosphere are:
A) hydrogen and helium. B) hydrogen sulfide and carbon disulfide. C) water vapor and carbon dioxide. D) methane and ammonia. E) sulfuric acid vapor and carbon dioxide.
Free Fall: Brick A is dropped from the top of a building. Brick B is thrown straight down from the same building, and neither one experiences appreciable air resistance. Which statement about their accelerations is correct?
A. The acceleration of A is greater than the acceleration of B. B. The acceleration of B is greater than the acceleration of A. C. The two bricks have exactly the same acceleration. D. Neither brick has any acceleration once it is released.