What are some of the problems with an isostatic model of crustal elevations that relies on wood blocks floating in water as an analogy?
What will be an ideal response?
The wood-block analogy requires a very weak crust that breaks at the edges of blocks and the breaks go all the way to the base of the blocks. The upper crust is strong (not weak) and faults do not penetrate all the way to the base of the crust. The water analogy assumes a much lower viscosity than Earth's mantle.
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Which body continually emits electromagnetic waves?
A. You and your classmates. B. The Earth. C. The Sun. D. all of the above
Collaborative Web mapping is an example of Web 2.0.
Answer the following statement true (T) or false (F)
The estimated number of planets in the Milky Way is ________ with some ________ in habitable zones
A) 25 million; 3 million B) 1 million; 1 (Earth) C) 300 billion; 125 billion D) 1 billion; 25 million E) 100 billion; 500 million
Is it possible for all the world's people to use as many resources as the average citizen of the United States?
What will be an ideal response?