quiz 9

Question 1

The entire state of Florida is composed of fossiliferous limestone. What does this imply about Florida during the recent past?

Answer 1

It was a submergent coast.

Question 2

What physical property of the underlying rock would lead to the formation of a cliff over which a waterfall may form?

Answer 2

a high resistance to erosion

Question 3

In uniform sediments with a relatively constant and gentle slope at the surface, a … drainage network is expected.

Answer 3

dendritic

Question 4

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.

Answer 4

oxygen

Question 5

Coastal landforms are constantly changing because the …

Answer 5

sand is constantly moving

Question 6

The Coriolis effect causes the apparent deflection of currents due to …

Answer 6

the rotation of the earth

Question 7

… increases the volume of water in and decreases the lag time of a flood.

Answer 7

Urbanization of an area

Question 8

Compared with the continental crust, the oceanic crust is ..

Answer 8

denser

Question 9

Dead zones occur due to a lack of
__ in the oceans.

Answer 9

oxygen

Question 10

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?

Answer 10

2%

Question 11

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?

Answer 11

Hot materials are less dense and expand; thus, new crust will sit higher than the surrounding crust.

Question 12

Thermohaline circulation carries …
water from the poles to the equator, where the water becomes …

Answer 12

cold; warm

Question 13

The stream gradient of most rivers …

Answer 13

is greater near the source than near the mouth

Question 14

A meander that is cut off to become completely isolated from the main channel but which retains water is a(n)

Answer 14

oxbow lake

Question 15

What type of material would you expect to find on the continental slope?

Answer 15

carbonate-rich sediments and shells

Question 16

The form and topography (depth profile) of the ocean floor is termed ..

Answer 16

bathymetry

Question 17

What would happen to the tides if the Sun and Moon are aligned?

Answer 17

High tide would be much larger.

Question 18

Meandering streams ..

Answer 18

have a channel that is highly sinuous (curvy)

Question 19

Major oceanic surface currents travel

Answer 19

at an angle to prevailing winds as a result of the Coriolis effect

Question 20

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.}

Answer 20

2121 years

Question 21

According to this map, where are you most likely to find upwelling currents?

Answer 21

the equator

Question 22

When sea level rises and floods a glacially carved valley, the area is called a(n)

Answer 22

fjord

Question 23

… provides the largest tide-generating force.

Answer 23

the moon

Question 24

The outer edge of a meander, where material is being eroded, is called a(n)

Answer 24

cut bank

Question 25

One way to mitigate flooding is to build .. which are areas that are intended to flood and as such are not zoned for buildings.

Answer 25

floodways

Question 26

A small mountain stream will have a … competence and a … capacity than the Mississipi river

Answer 26

greater, lower