Volcanologists study which of the following about volcanoes?
A. the origin of volcanos
B. The kinds of materials they release
C. the different shapes volcanos develop
D. the causes of eruptions
E. all of the above
E. all of the above
300
Name the largest and most well known volcano in Japan.
Mount Fuji
300
The opening from which lava erupts is called a what?
vent
300
The island of ______ was formed by many lava flows.
A. Hawaii
B. Cyprus
C. Europe
A. Hawaii
300
What are Composite volcanos made of?
alternating layers of rock particles and lava
300
Volcanic cones often have a ______ at their summit.
crater
400
Located in the islands of Hawaii, this is one of the world's most active volcanos.
Mount Kilauea
400
When lava builds up in a volcano, it can cause a volcano to become what shape?
cone-shaped
400
True or False:
Volcanic dust particles are smaller than a grain of sand.
True
(FYI- Volcanic dust particles are equal in size to a grain of flour)
400
Cinder Cone volcanos are formed from what?
explosive eruptions
400
Some volcanos are known to have erupted in modern times but are inactive now. They are called ________ volcanos.
"sleeping"
500
This volcano erupted in the Philippines in 1991 causing the second largest eruption in the twentieth century.
Mount Pinatubo
500
What is the place on the Earth's surface where magma and other materials reach the surface?
Volcano
500
Rock particles more then 0.25 mm, but less than 5mm in diameter* are called what?
diameter*-the distance across a circle
Volcanic ash
500
Volcanoes that form from quiet lava flows are called what?
shield volcanoes
500
True or False:
The word volcano originates from the name Vulcan. Vulcan means "a god of fire" in Roman mythology.