Volcanoes
Composite Cone Volcanoes
Where is the relationship of Earth's volcanoes and plate boundaries
They are mostly found near plate boundaries
When magma has a high silica content it is more likely to create what
a violent explosion
Carbon Dioxide and Water vapor are gases that
escape from volcanoes
A large depression in a volcano is a
When shield volcanoes grow from the ocean floor they form what
islands
What are structures that form beneath the earth from cooled and hardened magma called
plutons
what decreases as lava temperature increases
viscosity
where does most intraplate volcanic activity occur
What is not a factor in how violently a volcano erupts
the depth of magma inside a volcano
what type of volcano forms from the accumulation of fluid basaltic lava
shield volcano
sill
solid rock in the crust and upper mantle
why does magma rise and melt at divergent plate boundaries
decreased pressure
What is a particle larger than 64mm that is ejected from a volcano called
What type of volcano has the most explosive eruption
composite cone
after the rest of a volcano has worn away leaving a pipe made of rock what is this called
volcanic neck
magma flows from a magma chamber to the surface through what
pipes
What plays a big part in the form of a volcano?
magma composition
a fairly symmetrical volcano that has both layers of lava and pyroclastic deposits
a composite volcano
what landforms are formed at convergent ocean plate boundaries
ocean trenches
when basaltic lava hardens what type of surface does it form
a rough jagged surface
when saturated volcanic debris rapidly move down a steep volcanic slope as a mudflow this is called
a lahar
what is similar to a batholith but has less than 100 square kilometers exposed
a sill