Jointing in rocks is characterized by..
a.) the hinge lines connecting two limbs of an anticline or syncline
b.) closely spaced, parallel faults along which the blocks have moved in opposite directions
c.) structures formed where normal and reverse faults intersect
d.) roughly parallel fractures separating blocks that show no displacement
Answer: d.) roughly parallel fractures separating blocks that show no displacement
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Compared with the resultant of a pair of equal-length vectors at right angles to each other, the resultant when the angle is greater than 90° is
A. less. B. greater. C. the same. D. need more information
The site on the figure below that would most likely form a rock with large crystals is
A) A.
B) B.
C) C.
D) D.
E) E.
ANS: C
Oxygen in itself is a very reactive element. It binds quickly to other materials. Remember, free oxygen only became abundant in our atmosphere when photosynthetic organisms began producing more. Thus, if there is a large amount of free oxygen, then there is something present that is replacing it in the atmosphere. This is likely to be a life-form of some sort. Information can be found in the section Are There Other Ocean Worlds
Raising animals in feedlots leads to ____.
A. spacious living conditions for livestock B. less land use C. reduced meat production D. greater soil erosion E. increased overgrazing