How long did the process of density stratification of Earth last?
a. 100 million years
b. 100 thousand years
c. 10 billion years
d. 1 billion years
ANS: A
The density stratification of Earth lasted approximately 100 million years. Then the Earth began to
cool down. Information can be found in the section Earth, Ocean, and Atmosphere Accumulated in
Layers Sorted by Density
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In the process of getting energy to power your television, which of the following stages is the most energy efficient?
A. Thermal conversion of the energy from coal in the power plant B. Burning the coal to run the power plant C. Actually powering your television set D. Transmission to your house E. Mining the coal to run the power plant
Plants are divided into two major groups:a
coniferous and deciduous. b. vascular and spore-bearing. c. angiosperms and gymnosperms. d. vascular and nonvascular. e. seedless and non-seedless
How does an Andean-type mountain-building event compare to a Cordilleran-type? Consider tectonic environments as well as processes of formation
What will be an ideal response?
________ predicts that the higher a mountain range extends above sea level the deeper it extends into the mantle.
A. Isostatic adjustment B. Mohorovicic discontinuity C. Crustal rebound D. Mantle convection E. Subducting oceanic lithosphere