Earth's Layers
The partially melted layer of the upper mantle
What is the asthenosphere?
Plates that move apart form these boundaries.
What are divergent boundaries?
The point in earth's crust where the first major movement along the fault begins.
What is the focus?
This type of volcano has the most violent eruptions but can sometimes have quiet eruptions of flowing lava.
What is a composite volcano?
Most volcanoes in the United States are located in this state.
What is Hawaii?
The outermost layer of the earth
What is the crust?
Plates that collide or come together form these kinds of boundaries.
What are convergent boundaries?
The point directly above the focus where the energy from the earthquake is felt.
What is the epicenter?
This type of volcano has eruptions of ashes and cinders.
What is a cinder cone volcano?
This instrument measures seismic waves caused by an earthquake
What is a seismograph?
Made of iron, this is the extremely hot, inside layer of the earth.
What is the inner core?
Plates that grind past each other form this type of boundary.
What is a transform fault boundary?
These slow moving waves cause the surface of the earth to roll and sway
What are surface waves?
This type of volcano has a wider base and is shaped like a dome.
What is a shield volcano?
A continuous undersea mountain chain
What is the mid ocean ridge?
This layer includes the crust and part of the mantle
What is the lithosphere?
Earthquakes often occur at these plate boundaries.
What are transform fault boundaries?
These first waves of an earthquake are fast moving and move in a push-pull, back and forth direction.
What are P waves?
What is a "hot spot"?
Mount St. Helens is a volcano that erupted in 1980 in this U.S. state.
What is Washington?
The part of the crust that we live on
What is continental crust?
Volcanoes and mountains may form at this type of boundary.
What is a convergent boundary?
This scale measures the amount of energy released by an earthquake.
What is the Richter scale?
The largest active volcano in the world, Mauna Loa, is this type of volcano.
What is a shield volcano?
A convergent boundary formed this oceanic trench in the western Pacific Ocean.
What is the Mariana Trench?