The ____ states that sediment extends laterally in all directions until it thins and pinches out, or terminates, against the
edge of the depositional basin.
a. principle of original horizontality
b. principle of superposition
c. principle of lateral continuity
d. principle of cross-cutting relationships
e. principle of uniformitarianism
c
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Which of the following is true about the base level of a stream?
A) Base level indicates the normal (or base) flow level before flooding. B) The flat top of a mountain is the ultimate base level for most streams. C) A mountain is close to its base level if bedrock is close to the surface. D) Most streams have lower gradient close to their base level. E) Base level generally is near the steepest part of a stream's profile.
Bacteria and fungal spores are potential ________
A) the cause of high pesticide use in the home B) VOCs and POPs C) sources of radon in the home D) problems in degrading the ozone layer E) causes of "sick-building syndrome"
What is the osmolarity of a 3.3%(w/v) Na3PO4 solution?
A) 0.20 osmolar B) 0.40 osmolar C) 0.80 osmolar D) 1.6 osmolar
Which of these is a starting point for primary succession?
a. a neglected yard b. none of these is a starting point for primary succession c. a surface exposed by a retreating glacier d. abandoned farmland e. an abandoned city