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The process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle is called
subduction
It provides explanation of how oceanic crust and continents could move
waves formed by earthquakes used to acquire evidence about earth
direct and indirect evidence
sonar
volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
5 -70km
crust, mantle, core
What are seismic waves?
subduction
It provides explanation of how oceanic crust and continents could move
waves formed by earthquakes used to acquire evidence about earth
direct and indirect evidence
sonar
volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
5 -70km
crust, mantle, core
What are the three layers of the Earth?
subduction
It provides explanation of how oceanic crust and continents could move
waves formed by earthquakes used to acquire evidence about earth
direct and indirect evidence
sonar
volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
5 -70km
crust, mantle, core
What is the device used to record the echoes of the seafloor?
subduction
It provides explanation of how oceanic crust and continents could move
waves formed by earthquakes used to acquire evidence about earth
direct and indirect evidence
sonar
volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
5 -70km
crust, mantle, core
How does sea-floor spreading help support the idea that continents drift?
subduction
It provides explanation of how oceanic crust and continents could move
waves formed by earthquakes used to acquire evidence about earth
direct and indirect evidence
sonar
volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
5 -70km
crust, mantle, core
How thick is the crust?
subduction
It provides explanation of how oceanic crust and continents could move
waves formed by earthquakes used to acquire evidence about earth
direct and indirect evidence
sonar
volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
5 -70km
crust, mantle, core
What three types of evidence provided support for the theory of sea-floor spreading?
subduction
It provides explanation of how oceanic crust and continents could move
waves formed by earthquakes used to acquire evidence about earth
direct and indirect evidence
sonar
volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
5 -70km
crust, mantle, core
How do scientist study earth\\\'s interior?
subduction
It provides explanation of how oceanic crust and continents could move
waves formed by earthquakes used to acquire evidence about earth
direct and indirect evidence
sonar
volcanic processes on the ocean floor, magnetic stripes in the sea-floor, age of ocean floor
5 -70km
crust, mantle, core
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