The particles produced in volcanic eruptions are called
pyroclastic material
100
Large depression in a volcano?
What is caldera?
200
Substance resistance to flow.
What is viscosity?
200
Magma forms when solid rock in the crust and upper mantle.
What is liquifies.
200
Which of the following plays a major part in determining the form of a volcano?
a) elevation of a volcano
b) magma composition
c) local soil type
d) nearness of other volcanoes.
What is magma composition?
300
What is not a factor in how violently or quietly a volcano erupts: magma's composition, magma's temperature, magma's concentration of dissolved gases, magma's depth inside a volcano's vent.
What is magma's depth inside a volcano's vent.
300
Intrusive features form when magma is injected into fractures cutting across preexisting rock layers?
What is dike.
300
The broad slightly dome shapred volcanoes of Hawaii are
What is shield volcanoes.
300
Most shield volcanoes have grown from the ocean floor to form
What is islands.
300
Which type of landform develops at plate boundaries where one oceanic plate descends beneath another?
What is volcanic island arc.
400
As the temperature of lava increases:
a) its viscosity decreases
b) it begins to harden
c) its viscocity increases
d) it can flow a much shorter distance
What is its viscosity increases.
400
What structures form from the cooling and hardening of magma beneath Eath's surface are:
What is Plutons.
400
Type of volcano that is fairly symmetrical and has both layers of lava and pyroclastic deposits.
What is a composite cone volcano?
400
At divergent playe boundaries in the ocean, magma rises, and melts because of
What is a decrease in pressure.
400
Landforms at divergent ocean plate boundaries.
What is oceanic ridges.
500
A semimolton particle larger than 64mm in size ejected as glowing lava.
What is volcanic bomb?
500
When does lava plateaus form?
What is fluid basaltic lava flows out of fissures?
500
Most intraplate volcanic activity occurs where:
What is mantle plumes rise toward the surface within a plate.