9
QuizMultiple Choice

Characteristics of the Seafloor

Question 9 • RMA FL-2001310-Earth/Space Science Semester 2

Which statement accurately describes one aspect of plate tectonics that involves subduction and seafloor spreading?

Answer
A
Older crust is melted at subduction zones.
B
Crust is created at the coastlines of continents.
C
Continents do not move as a result of seafloor spreading and subduction.
D
Crust is created as the mantle hardens under the lithosphere.

Explanation

At subduction zones, older, denser oceanic crust sinks beneath another plate and is recycled into the mantle, where it can melt. Seafloor spreading creates new crust at mid-ocean ridges, not along continental coastlines. The movement of plates through spreading and subduction also moves continents, so A is the accurate statement.

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