What partly explains the seabed topography we observe?
a. The jostling due to plate tectonics.
b. The greater density of continental lithosphere.
c. The presence of continental margins.
d. The little interaction with the asthenosphere.
ANS: A
The jostling of the plates and isostatic equilibrium affects the topography of the ocean floor.
Information can be found in the section Ocean-Floor Topography Varies with Location
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A. is destroyed by halogens in chlorofluorocarbons. B. is only destroyed through natural processes. C. is only formed through natural processes. D. is formed mainly in the troposphere where it diffuses to the stratosphere.
Rainbows are always seen with the Sun:
A) ahead of you. B) behind you. C) to your left. D) 42 degrees above the horizon. E) to your right.
How do we know that Earth's magnetic field originates deep within Earth?
What will be an ideal response?
About 83% of the world's human population lives in ____.
A. nations with high average income per person B. the United States, Japan, Australia, and Germany C. more-developed countries D. less-developed countries E. environmentally-sustainable societies