Plate Tectonics
Volcanoes
Continental Drift
Earthquake
Random
100
What are the names of Earth's plates?
African, North American, South American, Eurasian, Australian, Antarctic, and Pacific plates.
100
Define Volcano.
A volcano is an opening, or rupture, in a planet's surface or crust, which allows hot magma, volcanic ash and gases to escape from below the surface.
100
What is continental drift?
A theory that states that all the continents were once conjoined to form one large super-continent.
100
What is an earthquake
An earthquake is the vibration of Earth produced by the rapid release of energy within the lithosphere.
100
How many states are there?
50.
200
How far do they shift every year?
2 cm to 10 cm per year
200
How are they formed?
They are formed when plates converge or diverge.
200
What was the name of the super-continent?
Pangaea.
200
How are earthquakes caused?
A slippage along a break in the lithosphere called a fault.
200
What are foreshocks?
Small earthquakes before a major earthquake.
300
What is the name where 2 plates meet?
Plate Boundaries.
300
What is the Pacific Ring of Fire?
An area where large numbers of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean.
300
What were some of the things that helped prove this theory?
Similar fossils, Similar rock type, Traces of Glaciation on widely separated landmasses.
300
What is the name of the point where the earthquake starts?
The focus.
300
What is an after shock?
An earthquake that soon occurs hours or even weeks after a major earthquake.
400
Boundaries have different names depending on how the two plates are moving in relationship to each other. What are they?
crashing: Convergent Boundaries, pulling apart: Divergent Boundaries, or sideswiping: Transform Boundaries
400
What are Volcanoes not made by?
Transforming Boundaries.
400
Why was this theory not accepted by many?
Proof of a force that could move the continents could not be given.
400
What is the epicenter?
The location on the surface right above the focus.
400
What is an elastic rebound?
The tendency for the deformed rock along a fault to spring back after an earthquake.
500
What is the definition of Plate Tectonics?
A theory that states the lithosphere, is broken into 7 large, rigid pieces called plates: the African, North American, South American, Eurasian, Australian, Antarctic, and Pacific plates. Several minor plates also exist, including the Arabian, Nazca, and Philippines plates.
500
What is magma?
Magma is a complex mixture of partly melted mineral crystals, gases, and water.
500
Who provided this theory?
A German scientist named Alfred Wegener.
500
What can the movement of land form?
Mountains.
500
What is the San Andreas Fault?
A fault system in California, this fault extends for aboue 1300km.
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