Plate Boundaries:
Definitions of Convergent boundary, divergent boundary, and the subduction zone

Convergent Boundaries:
A Convergent boundary is a major geologic discontinuity or suture marking the juncture of lithospheric plates that have been joined by plate tectonics.

Divergent Boundaries:
A Divergent Boundary is where two tectonic plates are moving away from each other.

Subduction Zone:
A Subduction Zone is the biggest smash-up on Earth, marking the collision between two of the planet's tectonic plates, the pieces of crust that slowly move across the surface over millions of years.

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