Layers
Innermost layer of the eart
What is the core?
This event occurs with a sudden movement of rocks in Earth's crust.
What is an earthquake?
This mountain forms around an opening in Earth's crust where lava may flow.
What is a volcano?
Plates collide along this kind of boundary
What is a convergent boundary?
The push-pull or back-and-forth waves caused by earthquakes that move rapidly in Earth's crust.
What are P waves (primary)?
Outermost layer of the earth
What is the crust?
This scale measures the amount of energy released in an earthquake.
What is the Richter scale?
This type of volcano has steep sides and alternates between violent and quiet eruptions.
What is a composite volcano?
This is the theory of plate movements
What is plate tectonics?
The up-and-down, slower waves in Earth's crust that occur in an earthquake.
What are S waves (secondary)?
Layer directly above the outer core
What is the mantle?
Earthquakes often occur along these boundaries.
What are transform fault boundaries (faults)?
This type of volcano is cone-shaped and built of ashes and cinders.
What is a cinder cone volcano?
Plates move away from each other along this type of boundary
What is a divergent boundary?
Earthquake waves that make the ground roll and sway
What are surface waves?
Layer that includes crust and upper mantle
What is the lithosphere?
This is the point in Earth's crust where an earthquake starts.
What is the focus?
This type of volcano is dome-shaped, has quiet eruptions and usually is large.
What is a shield volcano?
Plates grind past each other along this type of boundary
What is a transform fault boundary?
This device measures the intensity of waves during an earthquake.
What is a seismograph?
Zone of partially melted rock in upper mantle
What is the asthenosphere?
This is the point on Earth's surface directly above the focus.
What is the epicenter?
New sea floor forms when magma rises in this process.
What is sea-floor spreading?
This oceanic crust feature forms where two plates move apart
The amount of damage done by an earthquake is measured using this scale.
What is the Mercalli scale?