Geology 1113 Study Exam Correctly Answered.
Which of the following statements describe what happens to sediment when a longshore current meets a jetty? - CORRECT ANSWER Sediment is deposited on the up-current side of a jetty and eroded on the down-current side of a jetty.
Which of the follo...
Geology 1113 Study Exam Correctly Answered.
Which of the following statements describe what happens to sediment when a longshore current meets a jetty? - CORRECT ANSWER Sediment is deposited on the up-current side of a jetty and eroded on the down-current side of a jetty.
Which of the following describes the general pattern of movement of sand on a shoreline? - CORRECT ANSWER The incoming waves push the sand onshore at an angle and the outgoing wave pulls the sand out perpendicular to the shore, resulting in a net movement that is parallel to the shore.
Of the following options, which is the most common type of chemical weathering in a desert? - CORRECT
ANSWER Oxidation, iron-bearing silicates can produce a rust-colored stain tinting the desert landscape.
What size sediment can be transported by wind? - CORRECT ANSWER Sand, clay, silt
What does the term saltation refer to? - CORRECT ANSWER The skipping and bouncing of sand grains along the surface
Most of the erosional work in a desert is done by - CORRECT ANSWER running water
What characteristic defines deserts? - CORRECT ANSWER a dry climate, more evaporation than precipitation
At what latitudes do the large-scale, atmospheric convection cells bring dry air downward toward the Earth's surface? - CORRECT ANSWER Between 20-30° north and south
Deserts that lie outside of 20-30° north and south are most likely the result of - CORRECT ANSWER the presence of a rainshadow Precipitation occurs on the __________ of the mountain range, while the __________ is dry. - CORRECT ANSWER windward side; leeward side
When air __________, it is compressed and warmed. - CORRECT ANSWER sinks
Which of the following describes favorable conditions for transverse dune formation? - CORRECT ANSWER Areas with steady prevailing winds and abundant sand
Which of the following is a difference between barchan and parabolic dunes? - CORRECT ANSWER The tips of a parabolic dune point into the wind, while the tips of a barchan dune point downwind.
Barchanoid dunes are an intermediate form of - CORRECT ANSWER barchan and transverse dunes
What are cross beds? - CORRECT ANSWER Inclined layers in sediment or sedimentary rocks that reveal the direction of wave or wind transport
What do cross beds represent? - CORRECT ANSWER The moving front of a ripple or dune
Why do desert dunes migrate? - CORRECT ANSWER Wind erodes material on the back side of the dune and deposits it on the front side of the dune.
What size sediment can be transported by glaciers? - CORRECT ANSWER All sediments sizes can be transported by glaciers
Which two regions currently contain the world's last remaining ice sheets? - CORRECT ANSWER Antarctica and Greenland, Climate conditions support a glacier's growth
When was the last time North America had major ice sheets? - CORRECT ANSWER 18,000 years ago, the Wisconsin Episode Glaciation.
Which landform marks the furthest extent of an advancing glacier? - CORRECT ANSWER Terminal moraine, This ridge of glacial debris will be the furthest one from the glacier's source.
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