a molten mixture of rock-forming substances, gases, and water from the mantle
What is magma?
100
silica
What is a material found in magma that is formed from oxygen and silicon and affects whether the magma is thin and runny or thick and sticky called?
100
Shield, Cinder Cone, and Composite volcanoes
What are the four different kinds of volcanoes?
100
faults, volcanos, mountain ranges, and basins
What are the four geological features in California?
100
lava
What is liquid magma that reaches the surface called?
200
a major volcanic belt that is formed by the many volcanoes that rim the Pacific Ocean
What is the Ring of Fire?
200
a type of explosive eruption that hurls out a mixture of hot gases, ash, cinders, and bombs
What is pyroclastic flow?
200
A land form made up of many layers of thin, runny lava that erupts from long cracks in the ground.
What is a lava plateau?
200
The Sierra Nevada, the Coast Ranges, and the Transverse Ranges
What are the three mountain ranges in California?
200
the molten mixture of rock-forming substances, gases, and water from the mantle
What is magma?
300
two oceanic plates, or a continental plate and an oceanic pate
What are the two kinds of plate collisions that form a volcano?
300
They are all part of a volcano.
What are the crater, vent, pipe, side vent, and magma chamber all part of?
300
caldera
What is the huge hole left by the collapse of a volcano called?
300
the two volcanoes in California
What are Mount Shasta and Lassen Peak?
300
basin
What is a broad, bowl-shaped valley formed there the crust is bent downward called?
400
The result is the Hawaiian Islands.
What resulted from the Pacific plate drifting over a hot spot?
400
a volcano's stage of activity
What describes this: active, dormant, or extinct?
400
because the soil is fertile
Why do people settle near volcanoes?
400
They are found along or near the boundaries of plates.
Where are faults often found?
400
a mass of rock formed when a large body of mafma cools inside the crust
What is a batholith?
500
the Greek god of fire who forged stuff in volcanoes
Who is Hephaestus?
500
pahoehoe
What type of lava is fast moving, hot lava that is thin and runny?
500
hardened magma in a volcano's pipe
What is a volcanic neck?
500
The outcome of this process is the Central Valley.
What is the outcome of this process:the sierras and coast Ranges rose and the crust forming the Central Valley's floor was bent downward; slowly, a thick layer of sediment built up on the valley floor.
500
sill
What is a slab of volcanic rock that is formed when magma squeezes between layers of rock called?