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Convection currents.

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Large section of earths crust that moves as one unit?

Plate


How does the movement of the old and the new crust move in seafloor spreading?

In seafloor spreading, the old crust moves away from the mid-ocean ridge as new crust forms through volcanic activity. This movement is driven by the process of mantle convection, where hotter and less dense material rises at the ridge, pushing the tectonic plates apart. As new crust forms at the ridge, it gradually moves away from the ridge as more magma is added, creating a conveyor belt-like system of crustal movement.


Match the structure in column 1 to the characteristics in column 2 a moho barrier thinnest layer b oceanic crust layer that moves the crust c upper mantle located near the outer core d?

Moho barrier: Top of mantleOceanic crust: Thinnest layerUpper mantle: Moves the crustLower mantle: Borders liquid core


How does the age of oceanic crust compare to the age of continental crust?

Oceanic crust is generally younger than continental crust. Oceanic crust is continuously formed at mid-ocean ridges through volcanic activity and then gradually moves away from the ridge, undergoing processes that make it relatively young compared to the older continental crust.


What happens at a destructive margin?

At a destructive margin, also known as a convergent boundary, two tectonic plates collide. One plate is usually forced beneath the other in a process called subduction. This can result in the formation of deep ocean trenches, volcanic arcs, and earthquakes.