EARTHQUAKES
What happens when two transform boundaries grind past each other?
What is earthquake?
This is molten rock below ground.
What is magma?
Earthquakes and Volcanoes are usually located near these.
What is a plate boundary?
One of the materials that is extruded during an eruption.
What is lava, pyroclastic material, gas?
The amount of time between the arrival of P and S waves ____________________ the farther away from the earthquake you are.
What is increases?
The name of the instrument used to measure earthquakes.
What is a seismometer or seismograph?
Mt. St. Helens eruption was a _____________ eruption compared to Kilauea.
What is violent?
The mid-ocean ridge is an example of a ____________________ boundary.
What is divergent boundary?
the place in the Pacific where a lot of earthquakes/ volcanic activity/ tsunamis happen.
What is the Ring of Fire?
These seismic waves tend to cause the most damage.
What are surface waves?
These are the fastest seismic waves.
What are P waves?
This material changes the thickness of lava.
What is silica?
Name 1 of the major tectonic plates.
What is any of the following North American plate, South American plate, Eurasian Plate, Indo Australia plate, African plate, Antarctica plate?
This is the texture of pahoehoe lava.
What is smooth and ropy?
This kind of crust is formed at divergent boundaries.
What is new?
This is a scale used to measure earthquakes.
What is Richter or Mercalli?
This is the tube that rises from the magma chamber to the vent.
What is the conduit?
The kind of boundary found where 2 continents collide forming mountains.
What is convergent?
This rough, jagged, blocky lava has sharp edges and spiny projections.
What is aa?
This is the term for the faults associated with subduction zones that cause the earth's most powerful earthquakes.
What is megathrust?
The height, or _______________________ of seismic waves indicates how much ground shaking will occur.
What is amplitude?
Volcanic activity often begins when a ________________ develops in Earth's crust as magma moves forcefully to the surface.
What is a fissure?
The mechanism that causes the plates to move.
What is convection in the mantle?
Earthquakes can be located by this process.
What is trilateration or triangulation?
The name of the supercontinent that began breaking up 200 million years ago..
What is Pangaea?