How do soils become fertile?
A) deep and thorough leaching of parent material to release nutrients
B) mild weathering of parent material and addition of organic matter
C) human manipulation to retain moisture and improve texture
D) intimate interaction with the soil biota
B
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Infiltration capacity ____
A)determines if streams will have turbulent flow B)is low in loose, dry soils C)is the minimum rate at which surface materials absorb water D)determines if streams will have laminar flow E)determines if runoff will occur
A crustal block which is downtown with a steep fault scrap on either side is a ________.
a - syncline b - fault block mountain c - graben d - horst e - rift valley
Sound travels fastest in
A. ice. B. water vapor. C. water. D. same in all
A fault with both dip-slip and strike-slip movement is classified as a thrust fault. Indicate whether the statement is true or false