Science Olympiad Dynamic Planet Practice Test

Which type of tectonic boundary occurs when two plates move away from each other?

1. Convergent boundary

2. Divergent boundary

3. Transform boundary

4. Subduction zone

The correct answer is: Divergent boundary

The correct answer is the divergent boundary, which is characterized by two tectonic plates moving away from each other. This movement creates a gap that allows magma from the mantle to rise and solidify, forming new crust. Divergent boundaries are commonly found at mid-ocean ridges, where tectonic activity results in seafloor spreading, helping to build the oceanic crust. In addition to mid-ocean ridges, divergent boundaries can also occur on land, where rift valleys are formed as the continental crust is pulled apart. The process at these boundaries can lead to volcanic activity and earthquakes as the plates shift. Understanding divergent boundaries is essential for comprehending the dynamics of tectonic movement and the geological features that arise as a result of plate interactions. This type of boundary plays a critical role in the ongoing renewal and recycling of the Earth's crust, illustrating the processes driving plate tectonics.