____________ is a set of ideas.

A ________ is an opening in the Earth's crust.

The __________ refers to the reservior of magma located deep inside the volcano.

When the molten material is ejected at the earth's surface through a volcano or crack at the surface,it is called ____________.

A ___________ is the depression at the top of a volcano following a volcanic eruption.

Two plates moving along side each other is called ___________.

__________ occur where two plates slide horizontally past each other.

Two plates moving towards each other (both continental crust) is called ___________.

____________ is the one of the most tectonically active countries in the world.

___________ boundaries are also known as divergent boundary.