Earth Sci Ch.13

Which of the following is associated with ocean ridges? A. Volcanic Structures B. Rift Zones C. Mountainous Topography D. All of these

An echo sounder operates by measuring the time required for a _____.

The oceans cover approximately_____ percent of Earth's Surface. A. 40 B. 60 C. 70 D. 50

The _____Ocean is largest. A. Atlantic B. Pacific C. Arctic D. Indian

Which ocean has the greatest average depth?

Which one of the following concerning mid-ocean ridges is false? A. They are sites for submarine eruptions of basaltic lava B. Sediments include thick siliceous ooze deposits and sandy turbidite beds. C. They are where young lithosphere is added to the edges of spreading ocean plates D. Terrigenous sediment coverings are very thin or absent

"Black Smokers" are associated with _____. A. Hot water B. Mineral-rich waters C. oceanic ridges D. all of these

Manganese Nodule A. Biogenous B. Terrigenous C. Hydrogenous

Calcareous Ooze A. Biogenous B. Terrigenous C. Hydrogenous

Abyssal Plain Clay A. Biogenous B. Terrigenous C. Hydrogenous

Sediments derived primarily from the products of weathering on the continents are called. A. terrigenous sediment B. hydrogenous sediment C. biogenous sediement D. both terrigenous and biogenous sediment

Manganese nodules are an example of _____. A. terrigenous sediment B. both terrigenous and biogenous sediment C. biogenous sediment C. hydrogenous sediment

Minerals that crystallize directly from seawater are examples of _____. A. terrigenous sediment B. hydrogenous sediment C. both terrigenous and biogenous sediment D. biogenous sediment

The crests of mid-oceanic ridges _____. A. lie at depths exceeding 6 kilometers B. are heavily mantled with sediment C. are geologically old features D. contain active rift zones

It is thought that submarine canyons on the continental slope have been generated by?

Which of the following is NOT true of deep ocean trenches? A. They are long and narrow depressions B. They may act as sediment traps C. They are geologically very stable D.. They are sites where plates plunge back into the mantle

The BEST definiton of the outer edge of the continental shelf is that point where _____. A. it meets an oceanic ridge B. the water depth reaches 100 fathoms C. a rapid steepening of the gradient occurs D. the gradient becomes very gentle

___ develop where oceanic lithosphere bends downward and sinks into the mantle.

Concerning the distribution of land and water, which of the following statements is true?

Submarine canyons found on the continental slope and are believed to have been created ____________. a. by rivers during the ice age b. by faulting c. because of a plate plunging into the mantle d. none of these.