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.