The direct measurement of the motion of continental plates was impossible with land-based instruments because all motion is _____.
A ) absolute
B ) relative
C ) one-dimensional
D ) at less than 60 Hz
B ) relative
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According to the following reaction, which molecule is acting as a base?H2O + NH3 ? OH- + NH4+
A.
| H2O |
B. NH3
C. OH-
D.
| NH4+ |
E. none of the above
Forecast accuracy is broken down into the three categories: Short-range, medium-range, and climatic-range
Indicate whether the statement is true or false
A shale metamorphosed to medium metamorphic grade would become a(n)
A) slate. B) gneiss. C) amphibolite. D) schist.
The difference between open and closed systems is that
A. open systems can acquire matter and energy, but closed systems cannot. B. open systems are not predictable but closed systems are. C. open systems are much simpler in terms of the number of interactions between objects in the system. D. open systems occur on land and closed systems occur in the ocean.