Defenitions
what is a volcano?
a vent in Earth's crust through which molten rock flows
what is a convergent boundary?
when 2 plates collide and the denser plate sinks.
how many types of volcanoes are there?
4
what is a lava flow?
streams of molten rock that pour or ooze from an erupting vent
how many volcanoes are in the USA?
60
what is magma?
molten rock below earth's surface
what is divergent boundary
2 tectonic plates spread apart at a divergent boundary
What is a composite volcano?
Large, steep sided volcano made of andesite and rhyolitic lava and ash
what is an ash fall?
a rain of airborne ash resulting from a volcanic eruption
one state that has a volcano in usa
!double jeopardy! if you name them all
(Alaska, Hawaii, Washington, Oregon, and california)
what is lava?
molten rock that reaches earth's surface
what is a hot spot?
What is a Cinder volcano?
small, steep sided volcanoes made of explosive eruptions composed of basaltic lava
Mud flow
a moving mass of soil made fluid by rain or melting snow
what does volcanic ash in the atmosphere do?
blocks sunlight
what is a vent?
an opening in the crust where volcanic material escapes
where are most volcanoes formed
along the ring of fire
what is a caldera volcano?
large, volcanic depression formed when a volcano's summit collapses or is blown away by explosive activity
Pyroclastic flow
a fast-moving current of hot gas and volcanic matter
what does sulfuric acid do to skin
burns your skin
what is a dormant volcano?
A volcano that is not currently erupting but may erupt again.
Double Jeopardy! How does a convergent boundary cause the magma in a volcano to form
when thermal energy melts a subducting plate and forms magma the less dense magma rises through cracks in Earth's surface to form a volcano
what is a shield volcano?
Large, shield shape volcanoes with gentle slopes of basaltic lava
What is the risk for food and water
water and food can be undrinkable and contaminated
what do sulfuric acid droplets do to climate
they reflect sunlight, reducing temperature