Define the term volcanoes

A volcano is a natrual gap,vent in the earths crust

Where do volcanoes occour

Volcanoes are found along the plate margins

Name and briefly describe materials ejected from a volcano

Ash-Dust-mixture is called tuff Bombs-large globular rocks Gases-sulfur,carbon dioxide,nitrogen Lava-hot molten rock Pumice-stones filled with bubbles

describe 4 stages inolife cycle of a volcano

Active, Erupting, Dormant, Extinct