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What happens when you move roks away from the ocan ridge?
They increase in age and density, and decrease in temperature.
Which of these is the best evidence of seafloor spreading-ocean ridges-mid-oceanic mountains-volcanic islands-ocean trenches?
Ocean ridges is somewhat vague. Mid-ocean mountains are more precisely called mid-ocean ridges, so it seems like someone is trying to trip you up. The best evidence of seafloor spreading among the choices would be mid-ocean mountains. They are the buoyant, hot, new crust that is formed at the divergent plates of the world's oceans.
How would the age of the oldest rocks on the continents compare with the age of the oldest rocks on the seafloor if the rock on the continents is continually formed but not removed?
The oldest rocks on the continents would be much older than the rocks on the sea floor because the rocks on the continents are not being removed unlike the rocks on the sea floor that are made by the mid-ocean ridge are being removed by deep ocean trenches. this prossess that is occuring on the sea floor is called sea floor spreading. evidence of this is the Pacific ocean shrinking and the Atlantic ocean growing.
What was the theory that was shown to be correct by age evidence and magnetic clues?
Magnetic Reversal
What is commonly used to determine the age of seafloor samples recovered by the deep-sea drilling project?
sediment cores
How was the age of rocks in ocean basins determined?
Drilling.
How does the age of seafloor sediments change with increasing distance from the ocean ridge?
Age of seafloor rock and sediment increases with distance from the oceanic ridges.
How does the age of seafloor sediments change the increasing distance from the ocean ridge?
age increases
What happens when you move roks away from the ocan ridge?
They increase in age and density, and decrease in temperature.
How did scientist determaine the age of the ocean floor?
Through geomagnetic reversal whee they studying the magnetic properties of the seafloor.
How does the age of seafloor bedrock vary with distance from a mid-ocean ridge?
The further from the ridge, the older the oceanic crustal rock.
How does the age of seafloor sediments change the increasing distance from the oceans ridge?
age increases
What three pieces of evidence for Wegener's theory came from the sea floor?
seafloor spreading, age of the sea floor and ocean trenches.
Explain how an isochron map of the ocean floor supports the theory of seafloor spreading?
An isochron is a line on a map that connects points that have the same age. An isochron map of the ocean floor supports the theory of seafloor spreading because it shows the older rock near the deep sea trenches and the younger rocks near ocean ridges.
How does the age of rocks in the seafloor provide evidence of seafloor spreading?
Rocks in the seafloor are moving one place to another
What are the prominent features of the ocean floor?
The Atlantic Ocean seafloor has what appear to be "stretch marks" or creases branching out horizontally from the center of the ocean. The seafloor deepens (generally) from both sides up to 20,000 ft. until a central upward ridge is formed (Mid-Atlantic Ridge), running up the middle of the ocean between the western and eastern continents. In some places this ridge is only a few thousand feet deep. The Atlantic also has a few deep basins scattered throughout that are substantially deeper than the surrounding ocean. Some researchers report core samples taken of the seafloor crust show the age of the seafloor increasing as you travel away from the coastline, suggesting the seafloor has expanded outward from the central ridge over time.
Early results of the deep sea drilling project clearly justified the conclusion that?
the ocean basins are relatively young: no sea floor with the excess of age of 180mllion years
