What is usually the highest point on a beach?
A) Backshore
B) Berm crest
C) Beach scarp
D) Longshore bars
B
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What are some of the predicted effects of global warming on human populations?
What will be an ideal response?
Water vapor is a greenhouse gas that is present at higher concentrations in the atmosphere than CO2. Why then is CO2 considered to be the primary greenhouse gas?
A. Water vapor has a much longer residence time in the atmosphere than CO2. B. Warming is amplified by additions of CO2that decrease the amount of water vapor that the atmosphere can hold. C. Warming is amplified by additions of CO2that increase the amount of water vapor that the atmosphere can hold. D. Lower levels of water vapor drive increases in CO2 concentrations. E. Water vapor concentrations are decreasing while CO2 concentrations are increasing.
The principle that can be used to determine that the rocks shown in the photograph have not been deformed since they were deposited is the principle of
A. superposition. B. original horizontality. C. cross-cutting relations.
________ is a very fine-grained metamorphic rock that splits easily along parallel planes.
A. Slate B. Sandstone C. Marble D. Gneiss E. Arkose