Lesson 1
Volcanoes form along the mid-ocean ridges, where two plates move _____.
apart
A(n) _____ ______ is the spread of lava that pours out of a volcano.
lava flow
Repeated floods of molten material can form high level plateaus called _____ plateaus.
lava
The Ring of Fire is a major belt of ______.
volcanoes
What is the zodiac sign for people born between October 23 and November 21?
Scorpio
______ is molten material from the mantle that has reached Earth's surface.
The elements oxygen and silicon form _____, a material found in magma.
silica
When a volcano collapses, a hole called a ____ is left behind.
caldera
Geologist classify volcanic eruptions as quiet or _____.
explosive
On November 19, 1863, which president delivered the Gettysburg Address?
Abraham Lincoln
Yellowstone National Park marks the location of a huge ____ ______.
hot spot
Geologist say a volcano is ______ if it is expected to awaken in the future.
A _____ volcano is tall, cone-shaped, and made up of alternating layers of lava and ash.
composite
______ is what geologist call a volcano that is not likely to erupt every again.
Extinct
Which war ended on November 11, 1918?
World War One
A volcano is a(n) ______ that forms in Earth's crust when molten material reaches the surface.
mountain
A mixture of hot gases, ash, cinders, and bombs that erupt explosively are called an ______ flow.
pyroclastic
A ____ forms when magma cuts across rock layers and then hardens.
dike
A volcanic neck forms when magma hardens in a volcano's ____ and the surrounding rock later wears away.
pipe
Which autumn month is November in the Southern Hemisphere?
May
Volcanic belts form along the boundaries of Earth's _____.
plates
A(n) _______ ________ is a pocket of magma beneath the surface.
magma chamber
Volcanic necks and dikes form when magma cools and hardens into rock ___ reaching the surface.
before
A batholith forms from a large body of _____.
magma
Which nation celebrates its independence on November 30 from the UK?
Barbados