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Chapter 4 "Plate
Tec."
Chapter 5 "Earthquakes"
Chapter 6 "Volcanoes"
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100
A dense ball of solid metal
What is "The Earth's inner core"
100
The type of stress that squeezes rock until it folds or breaks is called what?
What is "compression"
100
Before lava reaches the surface, the molten material is called
What is "magma"
100
A collision between two pieces of continental crust at a colliding boundary produces a
What is "mountain range"
100
A place where two plates slip past each other, moving in opposite directions, is known as a what type of boundary?
What is "sliding boundary"
200
A layer of hot rock inside the Earth.
What is "Earth's mantle"
200
The scale that rates an Earthquake according to its intensity, or strength at a given place is the what?
What is "The Mercalli scale"
200
If a volcano’s magma is high in silica, the volcano will probably erupt how?
What is "erupt explosively"
200
Most geologists think that movement of Earth's plates is caused by what?
What is "convection currents in the mantle"
200
The geological theory that states that pieces of Earth’s lithosphere are in constant, slow motion is the theory of
What is "plate tectonics"
300
The name of the super continent that existed millions of years ago.
What is "Pangaea"
300
Which type of stress tends to lengthen the Earth’s crust?
What is "tension"
300
A mass of rock formed when a large body of magma cools inside the crust is called a what?
What is "a batholith"
300
Which type of seismic wave can make the ground move like ocean waves?
What is "surface waves"
300
Which type of stress tends to shorten part of the Earth’s crust?
What is "compression"
400
Any trace of an ancient organism that has been preserved in rock
What is "A fossil"
400
Underwater canyons where the ocean floor sinks back into the mantle are called what?
What is "deep ocean trenches"
400
When magma hardens in a volcano’s pipe, the result will eventually be a landform called a what?
What is "a volcanic neck"
400
Tall, cone-shaped mountains in which layers of lava alternate with layers of ash are called
What is "composite volcano"
400
Thick, sticky magma has a __________ silica content.
What is "high"
500
When molten material rises from the mantle and erupts along mid-ocean ridges.
What is "sea-floor spreading"
500
The point beneath Earth’s surface where rock breaks under stress and triggers an earthquake is called the what?
What is "focus"
500
A slab of volcanic rock formed when magma squeezes between horizontal layers of rock is a what?
What is "a sill"
500
A wide, gently sloping mountain made of layers of lava that erupted quietly is a what?
What is "a shield volcano"
500
The rating system that estimates the total energy released by an earthquake is called the what?
What is "the moment magnitude scale"