What is the most prominent feature on the ocean floor?
oceanic ridge system
What new findings about the ocean floor did oceanographers discover after ww2?
Oceanographers discovered after World War II that they discovered global oceanic ridge system that winds through all the major oceans. In other parts of the ocean, studies found in the Western Pacific demonstrated earthquakes occurring at great depths beneath deep-ocean trenches.
What new technology was used to map the seafloor beginning in the 1940s and 1950s?
Beginning in the 1950s, scientists, using magnetic instruments (magnetometers) adapted from airborne devices developed during World War II to detect submarines, began recognizing odd magnetic variations across the ocean floor.
Which scientist is credited with proposing the ideas that led to the development of the plate tectonics theory?
Plate tectonic theory had its beginnings in 1915 when Alfred Wegener proposed his theory of “continental drift.” Wegener proposed that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines (like South America and Africa) look like they fit together like a puzzle.
What are the 3 pieces of evidence for seafloor spreading?
Look at Figure 19 to see the process of sea-floor spreading. Several types of evidence from the oceans supported Hess’s theory of sea-floor spreading-evidence from molten material, magnetic stripes, and drilling samples.
What is the difference between continental drift and seafloor spreading?
Continental drift is a very similar process to seafloor spreading. Continental drift is the gradual movement of continental plates over the Earth’s surface over time. Seafloor spreading is the formation of new areas of oceanic crust due to the upwelling of magma as oceanic aparts pull apart.
Does seafloor spreading cause continental drift?
Seafloor spreading creates new oceanic crust at a mid-ocean ridge. Depending on the boundary type, the two plates will move (one subducted below the other or the two crash along side each other), but the seafloor spreading does’t really cause the continental plate to drift in either case.
What are the 5 ocean floor features?
Features of the ocean floor include the continental shelf and slope, abyssal plain, trenches, seamounts, and the mid-ocean ridge.
What is the seafloor called?
seabeds
What part of the ocean is 5200 m?
Tasman Basin
What is the deepest body of water in the world?
The deepest part of the ocean is called the Challenger Deep and is located beneath the western Pacific Ocean in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam. Challenger Deep is approximately 36,200 feet deep.
What is the deepest place on Earth?
Mariana Trench
How deep have we gone in the ocean?
It’s been a record-breaking expedition in more ways than one. Vescovo’s trip to the Challenger Deep, at the southern end of the Pacific Ocean’s Mariana Trench, back in May, was said to be the deepest manned sea dive ever recorded, at 10,927 meters (35,853 feet).
How deep can a human dive before being crushed?
about 35.5 km
Who has gone deepest in the ocean?
On 23 January 1960, two explorers, US navy lieutenant Don Walsh and Swiss engineer Jacques Piccard, became the first people to dive 11km (seven miles) to the bottom of the Mariana Trench.
At what depth will water crush you?
Human beings can withstand 3 to 4 atmospheres of pressure, or 43.5 to 58 psi. Water weighs 64 pounds per cubic foot, or one atmosphere per 33 feet of depth, and presses in from all sides. The ocean’s pressure can indeed crush you.