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WorksheetsSea floor spreading
Total questions: 10
Worksheet time: 6mins
What are three pieces of evidence that support sea floor spreading?
Evidence from molten material that creates mid ocean ridge
Rocks are younger near ridge and older further from ridge
Magnetic polar reversals every 250,00 years
deep oceanic trenches are helping create the mantle
Old oceanic floor is destroyed at
Subduction zones/ trenches
Mantle
Inner core
Outer core
Deep oceanic trenches are some of the deepest parts of the ocean floor where the oceanic crust slowly sinks toward the mantle
false
True
Where is new oceanic floor created at and how is it created
Created by mountains, outer core
created by volcanic eruptions, mid ocean ridges
Created by volcanic eurptions, inner core
Mantle
What are mid oceanic ridges?
Underwater volcanos
Subduction zones
Underwater chain of mountains where new sea floor is produced
I don’t even know dude
what is convection?
outer core expanding
Movement of sea floor
The Tenputure of water
The transfer of heat by the movement of particles in fluids
What causes sea floor spreading? And movement of tectonic plates
density
Conviction currents from mantle
Concection currents from inner core
Tempiture of water
Convection currents begin when there are differences in tempuryre and density in a fluid
True
False
The heat from the core of the earth causes convection currents in the mantle
False
True
Where do convection currents take place at?
Inner core
Outer core
Athenosphere
Lithosphere
