Vocabulary
This is used to measure the amount of energy released during an earthquake.
What is the Richter Scale?
The asthenospere is a zone of partially melted rock located in....
What is the upper mantle?
These are formed when two Continental Plates collide on a convergent boundary.
What are mountains?
S-waves do this.
What is cause vibrations that travel at right angles to the waves direction of travel?
Thick lava eruptions results in this kind of volcanic cones.
What are tall, steep cones?
A hot spot volcano can only occur along a plate boundary.
False. A hot spot volcano can break through the lithosphere in the middle of a plate.
This is the outermost layer of the Earth.
What is the crust?
This happens at a convergent boundary.
What is two plates collide?
This is where most Divergent boundaries are found.
What is along the mid-ocean ridge.
These are the fastest of an earthquakes waves.
What are P-waves or “push-pull” waves?
This is the volcano that has the most violent eruptions.
What is a Composite volcano?
The earth’s crust is always moving.
True. Earth’s crust is constantly in motion.
This is the point within the Earth’s crust that an earthquake’s movement begins.
What is the focus?
This layer includes the crust and the upper mantle.
What is the lithosphere?
The lithosphere includes the upper part of the mantle and this.
What is the crust?
Surface waves travel only on the surface and move...
What is slower than P-waves or S-waves?
This is the name for a mountain that forms when magma breaks through the earth’s crust and flows or erupts to form new land or sea floor.
What is a volcano?
Earthquakes are considered Earth’s main land builder.
False. Volcanos are considered Earth’s chief landbuilders. In fact, scientists estimate that 80 percent of the continents and the sea floor were formed from volcanic flows and eruptions.
This is a theory that scientists use to explain plate movements on the Earth.
What is plate tectonics?
This is where plates slide past each other.
What is a transform fault boundary.
When an Oceanic Plate and a Continental plate collide, why is the Oceanic Plate forced downward and under?
What is because Oceanic Plates are denser?
This is the scale we use to measure the damage an earthquake causes.
What is the Mercalli Scale.
Most volcanos occur at these.
What are plate boundaries?
Earth’s crust moves twice a year, during the summer and the winter solstice.
False. Earth’s crust is always moving to some degree.
This is the layer directly beneath the earth‘s crust.
What is the mantle?
This can happen at a divergent boundary.
What is sea-floor spreading?
This happens along convergent boundary.
Where do plates collide?
A volcano that erupts with thin lava that spreads over great distances is this kind.
What is a shield volcano?
There are about this many volcanos on land and many more on the ocean floor.
What is 600?
Earth’s continents and oceans have changed in the past and are in the process of changing now.
True.
This is the innermost layer of the Earth, made of superheated, but solid, iron.
What is the core?
The large, tile-like plates of the lithosphere float on the asthenosphere because of this.
What is the asthenosphere’s plasticity?
This is the term for magma being pushed up from the rift between the two continental plates meeting mid-ocean.
What is sea-floor spreading?
Most earthquakes occur here.
What is at or near the edges of moving plates?
Sometimes a volcano forms when a narrow column of molten rock breaks through this in the middle of a plate.
What is the lithosphere?
The crust is the thinnest of Earth’s layers.
True.