What types of structures form at divergent boundaries? Select the two correct answers. (1 point)
Responses
Ridges
Ridges
Cracks
Cracks
Trenches
Trenches
Faults
Faults
Volcanoes
The two correct answers for types of structures that form at divergent boundaries are:
1. Ridges: At divergent boundaries, two tectonic plates move away from each other. As they separate, magma from the mantle rises to fill the gap, creating a new crust. This process forms underwater mountain ranges called mid-ocean ridges, such as the Mid-Atlantic Ridge. These ridges can be tens of thousands of kilometers long and have a characteristic central rift valley.
2. Volcanoes: Along with the formation of ridges, the divergence of tectonic plates can also lead to volcanic activity. As the plates separate, magma rises to the surface, resulting in the formation of volcanic vents and volcanoes. This can occur both on land, forming volcanic mountain chains like the East African Rift System, or underwater, resulting in submarine volcanoes. These volcanic features are common at divergent boundaries, where magma is readily available due to the upwelling of the mantle.