Here's why:
* Divergent Plate Boundaries: These are areas where tectonic plates move apart.
* Oceanic Crust: The crust beneath the oceans.
* Mid-Ocean Ridges: Underwater mountain ranges that form along these divergent boundaries.
How it Works:
1. Magma Rises: As plates move apart, the space created allows magma from the Earth's mantle to rise.
2. Volcanic Activity: The magma erupts, creating new oceanic crust.
3. Ridge Formation: The repeated eruptions build up layers of volcanic rock, forming the mid-ocean ridge.
Key Points:
* Mid-ocean ridges are the primary source of new oceanic crust.
* They are characterized by volcanic activity, hydrothermal vents, and deep rift valleys.
* The mid-ocean ridge system is the longest mountain range on Earth, spanning over 65,000 km (40,000 miles).
