Stacey_Guide_8

Stacey_Guide_8 - (8) Study Guide-Ch. 4-Sea Floor/ Sediments...

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(8) Study Guide- Ch. 4 -Sea Floor/ Sediments (1-8-08) Sections 4.1, 4.2 1) How are ocean depths measured? -precision depth recorders (best way), underwater: cameras, television, robots, side scan sonar systems…etc. What is a “fathom?” -the distance between stretched hands- about 6 ft. 2) How does the speed of sound in water compare to that in air? -water: 1500 m/sec -air: 354 m/sec 3) Sketch and label a profile of a passive continental margin. 4) How are continental shelves formed and eroded? -formed: ocean flowed over the continents forming shallow areas along the coasts -eroded by constant storms, waves, and streams 5) What is the difference between a “passive” and “active” continental margin? - passive: found along the coastlines -active: found on the leading edge of the continent where it is crashing into an oceanic plate
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6) What are “submarine canyons?” -submarine canyons : found on continental slope -very steep; v-shaped vertical cross sections -formed by fast, avalanche-like downward slope
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Stacey_Guide_8 - (8) Study Guide-Ch. 4-Sea Floor/ Sediments...

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