quiz 9 Flashcards
The entire state of Florida is composed of fossiliferous limestone. What does this imply about Florida during the recent past?
It was a submergent coast.
What physical property of the underlying rock would lead to the formation of a cliff over which a waterfall may form?
a high resistance to erosion
In uniform sediments with a relatively constant and gentle slope at the surface, a … drainage network is expected.
dendritic
Dead zones are areas along the coasts where rivers spill excess nutrients into the oceans. Microorganisms feed on these nutrients, which in turn causes them to use up all the … in the water and kill larger organisms like fish.
oxygen
Coastal landforms are constantly changing because the …
sand is constantly moving
The Coriolis effect causes the apparent deflection of currents due to …
the rotation of the earth
… increases the volume of water in and decreases the lag time of a flood.
Urbanization of an area
Compared with the continental crust, the oceanic crust is ..
denser
Dead zones occur due to a lack of
__ in the oceans.
oxygen
If a 50-year flood occurs on the Mississippi River this year, what is the probability that a flood of the same magnitude will occur in the following year?
2%
Mid-ocean ridges (MORs), which are the sites of new oceanic crust formation, are linear mountain chains that run along divergent plate boundaries. Why does a MOR sit up higher than the surrounding oceanic crust?
Hot materials are less dense and expand; thus, new crust will sit higher than the surrounding crust.
Thermohaline circulation carries …
water from the poles to the equator, where the water becomes …
cold; warm
The stream gradient of most rivers …
is greater near the source than near the mouth
A meander that is cut off to become completely isolated from the main channel but which retains water is a(n)
oxbow lake
What type of material would you expect to find on the continental slope?
carbonate-rich sediments and shells
The form and topography (depth profile) of the ocean floor is termed ..
bathymetry
What would happen to the tides if the Sun and Moon are aligned?
High tide would be much larger.
Meandering streams ..
have a channel that is highly sinuous (curvy)
Major oceanic surface currents travel
at an angle to prevailing winds as a result of the Coriolis effect
Sea level is currently rising at 3.3 mm/ yr, and scientists predict that global warming could cause a rise in sea level of 7 m if left unabated. How long will it take the sea to rise 7 m at the current rate? [Note that melting all the ice on Greenland would provide a 7m rise.}
2121 years
According to this map, where are you most likely to find upwelling currents?
the equator
When sea level rises and floods a glacially carved valley, the area is called a(n)
fjord
… provides the largest tide-generating force.
the moon
The outer edge of a meander, where material is being eroded, is called a(n)
cut bank
One way to mitigate flooding is to build .. which are areas that are intended to flood and as such are not zoned for buildings.
floodways
A small mountain stream will have a … competence and a … capacity than the Mississipi river
greater, lower
