A volcano that has not erupted in over 10,000 years, and is not expected to explode again, is ________________.
Extinct
A volcano that is "asleep" but could still become active is ______________.
Dormant
A volcano that has erupted within the past 10,000 years is considered ______________.
Active
Molten rock beneath Earth's surface is ____________.
Magma
A circular depression caused by volcanic activity is called a _______________.
Crater
Molten rock that erupts from a volcano and solidifies as it cools is called ____________.
Lava
Which U.S. volcanic explosion caused the most fatalities?
1980 Mount St. Helens
True or false: there are over 1,000,000 submarine volcanoes on earth.
True
The largest active volcano on earth is found in __________________.
Hawaii (Mauna Loa)
True or false: there are volcanoes on every continent on Earth, including Antarctica.
True Pictured: Mt. Erebus
What is the Ring of Fire?
An area surrounding the Pacific Ocean where most of earth's volcanoes are found
Where is Mount Vesuvius located?
In Italy near Naples
True or false: In 1963, fishermen witnessed a new island being formed.
True. The island of Surtsey was formed when a submarine volcano breeched the surface of the Atlantic Ocean near Iceland.
The collapse of Mount Mazama approximately 7,700 years ago led to the formation of which U.S. National Park?
Crater Lake
Name three active volcanoes in the Cascade Range.
Mount St. Helens, Mt. Rainier, Mt. Shasta, etc.
Volcanoes are often located at the meeting points of __________________.
tectonic plates
