Vocabulary
Evidence of Plate Motions
Plate Tectonics
Earthquakes and Tsunami
Volcanoes
100
Liquid magma that reaches the surface
What is lava?
100
A supercontinent that incorporated almost all the landmasses on Earth
What is Pangea?
100
Dense type of crust that is found at the bottom of the ocean
What is oceanic crust?
100
To find an earthquake epicenter you need at least this number of seismographs.
What is 3?
100
An opening in the earth's crust through which lava, volcanic ash, and gases escape.
What is a volcano?
200
A giant wave caused by an earthquake beneath the ocean floor.
What is a tsunami?
200
Undersea mountain chains where new ocean floor is produced
What are mid-ocean ridges?
200
Type of boundary is represented here
What is a transform boundary?
200
Instrument used to record the motion of the ground during an earthquake
What is a seismograph?
200
Type of magma that would erupt more explosively
What is high silica magma?
300
An undersea valley that represents one of the deepest parts of the ocean.
What is an ocean trench?
300
Sinking movement of ocean floor back into the mantle
What is subduction?
300
90 % of the volcanoes occur here
What is the Ring of Fire?
300
The first seismic waves to arrive at a location after an earthquake
What are P-waves?
300
The smallest volcanic landform.
What are cinder cone volcanoes?
400
A plate boundary where two plates move toward each other.
What is a convergent plate boundary?
400
Meteorologist who proposed the theory of continental drift
Who was Alfred Wegener?
400
Kind of plate boundary that created the Himalayas
What is a convergent plate boundary?
400
Type of stress represented here
What is tension?
400
The location beneath the vent of a volcano where molten rock (magma) is stored prior to eruption
What is the magma chamber?
500
An idea that has been studied and investigated and is supported by a vast and diverse array of evidence.
What is a theory?
500
Preserved remains, impression, or trace of any once-living thing from a past geological age
What are fossils?
500
It takes 200,000 years for a plate to move about 4 kilometers. What is that plate’s rate of motion in centimeters per year?
What is 2 cm/year?
500
Energy difference between a 7.0 and a 9.0 magnitude earthquake
What is 1024? (accept about 1000)
500
Device that measures small changes in the vertical level of the ground or structures
What is a tiltmeter?