socialscience

2. KERALA UNIVERSITY
COLLEGE OF TEACHER
EDUCATION
NEDUMANGAD

3. PRESENTED
BY
NAME ANILA KRISHNAN AG
OPTION SOCIALSCIENCE
REG. No. 13983003

4. VOLCANOES ARE CAUSED WHEN MOLTEN
ROCK (MAGMA)FLOWS OUT INTO THE
EARTH’S SURFACE THROUGH FISSURES
THAT ARE CAUSED DUE TO THE
MOVEMENT OF PLATES. THE FISSURES ,
THROUGH WHICH MAGMA COMES OUT
FROM THE AESTHENOSPHERE ON TO THE
CRUST OF THE EARTH IS KNOWN AS THE
VENT THE ROCKS AND OTHER MATERIAL
WHICH COME FROM THE SURFACE OF
THE EARTH ACCUMULATES TO DEVELOP
VOLCANIC MOUNTAINS.

6. DIFFERENT TYPES OF
VOLCANOES
ACTIVE
EXTINCT
DORMANT

7. ACIVE VOLCANOS
 THOSE THAT FREQUENTLY ERUPT
EXAMPLE : MOUNT ETNA IN ITALY

8. EXTINCT VOLCANOES
 ACTIVE AT A TIME . BUT IT WILL NOT ERUPT
AGAIN
EXAMPLE : KILIMANJARO IN AFRICA

9. DORMANT VOLCANOES
 THOSE THAT HAVE ERUPTED EARLIER AND NOT
ACTIVE IN THE RECENT PAST . BUT CAN BECOME
ACTIVE
EXAMPLE : VESUVIES IN ITALY