Trigger volcanoes. Create new sea floor ... Also known as spreading boundary, a divergent boundary occurs where two plates move apart, allowing magma, or molten rock, to rise from the Earth's ...

Volcanoes are openings where lava ... it to push upward and break through weak areas in the crust caused by divergent tectonic plates or other faults. Once the magma reaches outside air, it ...

These types of collisions can also lead to underwater volcanoes that eventually build up into island arcs like Japan. At divergent boundaries in the oceans, magma from deep in the Earth's mantle ...

producing volcanoes, such as Mt. St. Helens. Most of the subducting plate continues into the mantle, perhaps to reappear much later at a distant divergent boundary.

Gather your supplies! In this episode we will use everyday materials to learn about tectonic plates and fault lines.