Which stellar spectral type has the strongest molecular absorption lines in its visible light spectrum?
A) O
B) B
C) G
D) K
E) M
E) M
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If the spiral density wave were the only thing producing spiral arms, it would be expected that
a. all spiral arms would be gas and dust free. b. all galaxies would have only two smooth spiral arms. c. the Milky Way would show and irregular pattern of short arms . d. the Milky Way wouldn't have any spiral arms. e. the halo component of the Milky Way would show spiral arms as well.
Light traveling at an angle into a denser medium is refracted
A) toward the normal. B) away from the normal. C) perpendicular to the normal. D) parallel to the normal. E) equally.
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Exhibit 3-2
A child starts at one corner of a cubical jungle gym in a playground and climbs up to the diagonally opposite corner. The original corner is the coordinate origin, and the x, y and z axes are oriented along the jungle gym edges. The length of each side is 2 m.
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Use this exhibit to answer the following question(s).
Refer to Exhibit 3-2. What is the child's distance from her starting position?
A. 2.8 m
B. 3.5 m
C. 6.0 m
D. 6.9 m
E. 12.0 m
The conversion of solar radiation into chemical energy by plants that releases oxygen is called
A) plant succession. B) photosynthesis. C) dendrochronology. D) deforestation. E) podzolization.