What are the parts of the ocean floor?
Features of the ocean floor include the continental shelf and slope, abyssal plain, trenches, seamounts, and the mid-ocean ridge. The ocean floor is rich in resources. Living things on the ocean floor are used for food or medicines.
What are the main sections of the ocean floor?
Underwater landformsContinental shelf. Starting from land, a trip across an ocean basin along the seafloor would begin with crossing the continental shelf. Abyssal plains. Continuing your journey across the ocean basin, you would descend the steep continental slope to the abyssal plain. Mid-ocean ridge. Ocean trenches.
What are the 4 parts of the ocean?
Historically, there are four named ocean basins: the Atlantic, Pacific, Indian, and Arctic. However, most countries – including the United States – now recognize the Southern (Antarctic) as the fifth ocean basin. The Pacific, Atlantic, and Indian are the most commonly known.
What are the 5 techniques used to map the ocean floor?
There are three tools used to map the ocean floor, sonar, satellites, and submersibles. Sonar is a type of electronic depth-sounding equiptment made in ‘s.It is an acronym for sound navigation and ranging. Sonar is also known as echo sounding.
What is underwater mapping called?
Seafloor mapping, also called seabed imaging, is the measurement of water depth of a given body of water. Bathymetric measurements are conducted with various methods, from sonar and Lidar techniques to buoys and satellite altimetry.
What is the feature on the ocean floor at C?
The feature on the ocean floor at C is called a(n) deep Ocean Frencia . 8. The process that continually adds new material to the ocean floor is – called Sea floor spreading.
What is below the ocean floor?
Features of the ocean include the continental shelf, slope, and rise. The ocean floor is called the abyssal plain. Below the ocean floor, there are a few small deeper areas called ocean trenches. Features rising up from the ocean floor include seamounts, volcanic islands and the mid-oceanic ridges and rises.
Why is the ocean floor so difficult?
Why is much of the ocean floor so difficult to see? In the movie, Tim says that ocean currents deposit sediment on the ocean floor.
What is it called when the ocean floor sinks back into the mantle?
The process by which the ocean floor sinks into the mantle is called Subduction. 10. A chain of underwater mountains along which sea-floor spreading occurs is a Mid ocean Ridge.
What do you call the process that constantly adds new crust?
Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
What are the two evidence of seafloor spreading?
Abundant evidence supports the major contentions of the seafloor-spreading theory. First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge.
What are 3 types of evidence for seafloor spreading?
Evidence of Sea Floor SpreadingMolten material. Hess’s discovery on the warmer temperature near the mid-Atlantic ridge when he began the ocean mapping, led to his evidence about the molten material underneath the ocean. Seafloor drill. Radiometric age dating and fossil ages. Magnetic stripes.
What does seafloor spreading look like?
Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor. The Mid-Atlantic Ridge, for instance, separates the North American plate from the Eurasian plate, and the South American plate from the African plate. The Mid-Atlantic Ridge, for instance, is a slow spreading center.
How old is the youngest seafloor?
The data is from four companion digital models of the age, age uncertainty, spreading rates and spreading asymmetries of the world’s ocean basins. Scientists use the magnetic polarity of the sea floor to determine the age. Very little of the sea floor is older than 150 million years.
What are the three steps to create new ocean floor?
convergent boundary — plates converge, or come together. divergent boundary — two plates diverge, or move apart and new crust or lithosphere is formed. transform fault boundary — plates slide past one another with no creation or destruction of lithosphere.
What drives the plates to move around?
Tectonic shift is the movement of the plates that make up Earth’s crust. The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.
Which is the first step in the seafloor spreading process?
1. A long crack in the oceanic crust forms at a mid ocean ridge. 2. Molten material rises and erupts along the ridge.
Can two oceanic plates converge?
Convergence can occur between an oceanic and a largely continental plate, or between two largely oceanic plates, or between two largely continental plates.
What happens when two oceanic plates collide quizlet?
When two oceanic plates collide, the denser plate is subducted and some material rises upward and forms an ISLAND.