WELCOME

Name : ANEEJA R. D.Register No. : 169/13376002Name of College : New B.Ed. College

Nellimoodu

TOPIC : VOLCANOES

VOLCANOES ARE CAUSED WHEN MOLTEN ROCK (MAGMA) FLOWS OUT INTO THE EARTHS SURFACE THROUGH FISSURES THAT ARE CAUSED DUE TO THE MOVEMENT OF PLATES.

VENT

THE FISSURES, THROUGH WHICH THE MAGMA COMES OUT FROM THE AESTHENOSPHERE ON TO THE CRUST OF THE EARTH.

CRATER

THE FUNNEL SHAPED DEPRESSION THAT CAN BE SEEN ON THE SUMMIT OF A VOLCANOE

BASED ON THE CHANGES OF ERUPTION THE VOLCANOES ARE CLASSIFIED INTO THREE1. ACTIVE2. EXTINCT3. DORMANT

ACTIVETHOSE THAT FREQUENTLY CRUPT. EG. MOUNT ETNA IN ITALY, MOUNT, FUJIYAMA IN JAPAN

EXTINCT

ACTIVE AT A TIME BUT WILL NOT ERUPT AGAIN EG. KILMANJARO IN AFRICA

DORMANT

THOSE THAT HAVE ERUPTED EARLIER AND NOT ACTIVE IN THE RECENT PAST. BUT CAN BECOME ACTIVE. Eg. VESUVIUS IN ITALY

THANK YOU