Volcanoes Flashcards
•Vent, hill or mountain from which molten or hot rocks with gaseous material have been ejected
•Commonly found along plate boundaries
Volcanoes
75% of volcanoes are located inside
Pacific ring of fire
•At least one eruption within/during 10,000 years
Active volcano
An active volcano that is expected to erupt
Dormant volcano
Inactive volcano that is not expected to erupt
Extinct Volcano
It is a funnel shaped opening at the top of a volcano
Crater
Enormous eruption in a short period of time
Caldera
Molten rocks beneath earth’s surface
Magma
Molten rock that erupts from a volcano
Lava
Long and narrow opening leaves from the top of the magma chamber to the earth’s surface
Throat
•Opening in earth’s surface
•The place at the earth’s surface where lava flows and fragmented rocks are erupted
Vent
Tabular sheet that has intruded between older layers of sedimentary rocks
Sill
The channel or pipe that carries magma from a reservoir or chamber to the vent where it is erupted
Conduit
Fragments of rock mineral crystals and volcanic glass created during volcanic eruptions and measuring less than 2 mm in diameter
Volcanic ash
What are the three parts of a volcano?
Summit
Slope
Base