The most popular theory for the origin of the moon today is ________
A) the early Earth and a planet the size of Mars collided, and the ejected material coalesced to form the earth's moon.
B) the earth captured a small planet, which is our moon.
C) the moon and Earth coalesced from an eddy in the solar nebular, forming a binary planet system.
D) the moon was formed when Mars and a comparable size planet collided, and the moon was ejected toward Earth and captured.
A
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Mid-ocean ridges form where two ocean plates
A. are destroyed. B. subduct. C. collide. D. diverge. E. slide past each other.
Along the polar front we may expect:
a. typhoon generation. b. a belt of maximum sunshine. c. passage of middle latitude cyclonic waves. d. passage of tropical waves.
The key property that determines whether fluid (air or water) sinks or rises is ________.
A. salinity B. density C. chemical composition D. temperature E. sound
Give a brief overview of the carbon cycle. Include the source of carbon that enters ecosystems, how it moves through ecosystems, what it is used for, and where it is ultimately deposited. What part of this cycle is believed to contribute to global
warming? What will be an ideal response?