Science 9 Volcanoes & Constellations

Pertains to all volcanic activities and phenomena which build up surface features.

are mountains,hills, or any vent or opening on the earth's crust which hot materials such lava are expelled

The opening of a volcano is called___

The thickness of the earth's crust ranges from ___ to ____ kilometers as per US Geological survey

The thickness of the crust is divided into 7 major and 152 pieces called

a layer of semi-liquid rock and dissolved gases

is the term given to magma that has erupted

What are of Volcanoes

• According to types of Cones

• According to Activity

• According to Degree of Explosion

What are the types of Volcanoes according to Cones?

• Shield

• Cinder Cone

• Stratovolcano

• Active Volcanoes

• Inactive Volcanoes

extrudes highly fluid and forms a broad, doomed structure and expels BASALTIC LAVA and pyroclastic meterials.