Podcast
Questions and Answers
What process occurs at mid-ocean ridges?
What process occurs at mid-ocean ridges?
- Oceanic plates sink into the mantle.
- Magma rises to the surface and forms new crust. (correct)
- Continental plates collide and create mountain ranges.
- Sediments accumulate on the ocean floor.
What role does water play in the formation of new crust at mid-ocean ridges?
What role does water play in the formation of new crust at mid-ocean ridges?
- It cools the magma, allowing it to solidify into rock. (correct)
- It vaporizes and creates pressure to drive magma upwards.
- It mixes with magma to form new types of minerals.
- It erodes existing crust to make room for new formations.
In the context of the E. African Rift, what ultimately results from rainwater filling the rift?
In the context of the E. African Rift, what ultimately results from rainwater filling the rift?
- Development of an ocean as the rift expands. (correct)
- Formation of a new continent.
- Creation of large glaciers in the region.
- Erosion of surrounding mountains.
What evidence indicates the direction of plate movement in divergent boundaries?
What evidence indicates the direction of plate movement in divergent boundaries?
Which statement correctly describes the formation of new crust at mid-ocean ridges?
Which statement correctly describes the formation of new crust at mid-ocean ridges?
Flashcards
Mid-Ocean Ridges
Mid-Ocean Ridges
Underwater mountain ranges where new crust forms as magma rises and cools.
Plate Divergence
Plate Divergence
The process by which two tectonic plates move apart from each other.
E. African Rift
E. African Rift
A continental rift where rain fills a valley, eventually forming an ocean.
Magma Cooling
Magma Cooling
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Continental Plates
Continental Plates
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Study Notes
Divergent Plate Boundaries
- Oceanic-Oceanic: Magma rises into a crack, cools, and forms mid-ocean ridges.
- Continental-Continental: Rain falls into the rift, filling it and creating an ocean. This rock rises to form the bottom. An example is the East African Rift.
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