Vocabulary
Liquid rock before it reaches the surface.
What is Magma?
A collision of two tectonic plates.
What is a Subduction Zone?
Where magma from deep within the mantle melts through the crust above it.
What is a Hotspot?
The process by which molten material adds new material to the ocean floor.
What is Seafloor Spreading?
A tectonic belt of volcanoes and earthquakes.
What is The Ring of Fire?
Seafloor mountain system formed by tectonic plates.
What is a mid-ocean ridge?
Volcanoes forming a string of islands.
What is an Island Arc?
The process of oceanic crust sinking beneath a deep-ocean trench.
What is Subduction?
The denser mantle sinks causing subduction and the hotter mantle rises.
What is Density?