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

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

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

____________ is a set of ideas.

The crust is a solid and is divided into __________ main types.

The ___________ is semi-molten.

There are ___________ large plates in earth.

____________ boundaries are also known as convergent boundaries.

The core is divided into __________.

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