Science--Unit 1: Chapter 3 (Volcanoes)

A(n) ______ is a substance that cannot be broken down into other substances.

element

A substance made of two or more elements that have been chemically combined is a(n) ___________.

compound

A quiet eruption may produce slow moving, cooler lava that hardens to form rough chunks. This type of lava is called _____.

aa

The resistance of a liquid to flowing is called ___________.

viscosity

When molten material has LEFT a volcano's vent and escaped TO THE SURFACE it is called _____________.

???

A major volcanic belt known as the __________ circles the Pacific Ocean.

Ring of Fire

A liquid with little __________ among its particles will have low viscosity.

friction

A(n) _________ is an area where material from deep within the mantle rises and then melts, forming magma.

hot spot

A string of islands known as a(n) _______ can form from the collision of two oceanic plates.

island arc

Magma flows easily when it is low in _________, a material made of oxygen and silicon.

silica

Where are volcanoes found?

Most volcanoes are found along plate boundaries.