The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways ...

Plate tectonics is the theory that Earth's outer ... plate tectonic activity takes place at four types of boundaries: divergent boundaries, where new crust is formed; convergent boundaries ...

Keep an eye on the map to see where in the world the activity takes place. Also known as spreading boundary, a divergent boundary occurs where two plates move apart, allowing magma, or molten rock ...