BATHYMETRY _____ 1) In 1920s _________ were invented; they time a sound wave bou
ID: 201 • Letter: B
Question
BATHYMETRY
_____ 1) In 1920s _________ were invented; they time a sound wave bouncing off the bottom to measure depth.
A) multibeam sonar B) satellite bathymetry C) echo sounding D) seismic surveying
_____ 2) Echo sounders time ______________ bouncing off the seafloor to measure depth.
A) light B) a sound wave C) a surface wave D) a tsunami
_____ 3) The deepest major unit of the ocean is the ____________________.
A) continental margin B) mid-oceanic ridge C) deep ocean basin
_____ 4) The shallowest major unit of the ocean is the ____________________.
A) continental margin B) mid-oceanic ridge C) deep ocean basin
_____ 5) The longest mountain range in the world, over 40,000 miles long, is the ________________.
A) Andes Mountains B) Rocky Mountains C) mid-oceanic ridges D) Himalayan Mountains
_____ 6) The average depth of the ocean is ______________.
A) 800 ft B) 0.5 mile C) 2.5 miles D) 4.0 miles
_____ 7) There is more land in the ____________ hemisphere than the ______________ hemisphere.
A) northern; southern B) southern; northern C) The amount of land is equal in the 2 hemispheres.
CONTINENTAL MARGINS
_____ 8) A continental shelf, continental slope, and a continental rise is a(n) _____________________.
A) active continental margin B) passive continental margin C) abyssal plain
_____ 9) A continental shelf and a continental slope without a continental rise is a(n) _____________________.
A) active continental margin B) passive continental margin C) abyssal plain
_____ 10) Which part of the continental margin gives the ocean most of its depth?
A) continental shelf B) continental slope C) continental rise
_____ 11) Which part of the continental margin is missing in an active continental margin?
A) continental shelf B) continental slope C) continental rise
_____ 12) Which part of the continental margin is the least sloped and is an extension of the land?
A) continental shelf B) continental slope C) continental rise
_____ 13) Which part of the continental margin is the steepest?
A) continental shelf B) continental slope C) continental rise
_____ 14) Which part of the continental margin is exposed during ice ages?
A) continental shelf B) continental slope C) continental rise
_____ 15) _________________ are coastlines where tectonics is taking place, for example along
the west coast of South America.
A) Passive continental margins B) Hot spot traces
C) Active continental margins D) Spreading ridges
_____ 16) _________________ are coastlines where no tectonics is taking place, for example along
the east coast of South America.
A) Passive continental margins B) Hot spot traces
C) Active continental margins D) Spreading ridges
DEEP OCEAN BASINS
_____ 17) _____________________ form when sediment fills in and smoothes the rough seafloor.
A) Seamounts B) Atolls C) Guyots D) Abyssal plains
_____ 18) _________ are formed when an island is eroded away and subsides below the surface of the ocean.
A) Guyots B) Seamounts C) Atolls D) Abyssal hills
_____ 19) ______________ are flat topped seamounts that formed from erosion of island at the surface followed
by subsidence of the seamount due to cooling lithosphere.
A) Guyots B) Seamounts C) Atolls D) Abyssal hills
_____ 20) Trenches are found at ___________________ plate boundaries.
A) convergent B) transform fault C) divergent
_____ 21) Volcanic activity near a trench forming seamounts and islands result in a __________________.
A) volcanic island arc B) continental volcanic arc C) hot spot trace D) mid-oceanic ridge.
_____ 22) The Aleutian trench at a(n) ________________________.
A) oceanic-oceanic subduction zone B) oceanic-continental subduction zone
C) continental-continental subduction zone D) oceanic-oceanic rift
MID-OCEANIC RIDGES
_____ 23) Mid-oceanic ridges are found at ___________________ plate boundaries.
A) convergent B) transform fault C) divergent
_____ 24) Rift zones are found at _______________________.
A) hot spot traces B) trenches C) mid-oceanic ridges D) seamounts
_____ 25) Most of the tectonic activity associated with the mid-oceanic ridges occurs _______.
A) at least 100 miles from the rift valley of that ridge
B) the rift valley of that ridge
C) at the subduction zone of that ridge
D) at the hot spot of that ridge
Explanation / Answer
1.c
2.d
3.a
4.b
5.a
6.a
7.d
8.b
9.d
10.d
11.a
12.b
13.a
14.a
15.b
16.d
17.b
18.d
19.a
20.b
21.a
22.d
23.b
24.d
25.b
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