The correct option is, (B) as the plates pull apart, magma moves to the surface, building ridges.
When the sea floor spreads apart volcanoes and ridges are formed because?
- Seafloor spreading occurs at divergent plate boundaries.
- As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense.
- The less-dense material rises, often forming a mountain or elevated area of the seafloor.
What happens during the process of sea floor spreading?
- Sea-floor spreading is what happens at the mid-oceanic ridge where a divergent boundary is causing two plates to move away from one another resulting in spreading of the sea floor.
- As the plates move apart, new material wells up and cools onto the edge of the plates.
Which of the following is formed when seafloor spread?
- The phenomenon is known today as plate tectonics.
- In locations where two plates move apart, at mid-ocean ridges, new seafloor is continually formed during seafloor spreading.
What are seafloor structures?
- 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.
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