What is the geologic definition of soil? How does it differ from other definitions?
What will be an ideal response?
Geologists commonly define soil as a layered mixture of loose mineral and organic constituents that have different physical and/or compositional properties than the original non-weathered material.
Engineers define soil as any surface material that is not solid rock and would include all of the geological soil plus any unconsolidated sediment. Soil scientists define soil as a medium for plant growth and would include all of the geological soil plus synthetic plant growth mediums.
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What is the origin of most abyssal plain sediments?
A) Deep-ocean basalt B) Biological activity C) New crust development D) Erosion from the continent
Scientists believe that answers to questions are ____
A) ?always questionable B) ?sometimes correct, but mostly wrong C) ?ultimately knowable D) ?extremely simple if you look in the right places
A student makes the following statement: "Soils are immature in Alaska mainly because there is little rain fall in the arctic." Evaluate this statement
A) It is true. B) It is false. The main factor is time. C) It is false. The main factor is temperature. D) It is false. The main factor is organic matter.
Elastic solids:
a. are rigid and brittle. b. flow slowly in response to stress. c. are melted rock matter. d. comprise the outer core. e. comprise the asthenosphere.