earth science final
part 2
Terms
undefined, object
copy deck
- intensity
- the amount of shaking produced by an earthquake
- continental crust has the average composition of _____
- granite
- evidence that the earth's core has a high iron content comes from ____
- meteorites
- foreshock
- may occur days or years before the major earthquake
- p waves
- compress and expand rocks
- how can you prevent very bad affects of earthquakes
- design buildings with material that can withstand them
- example of foleded mountains
- the apls in europe
- accretion
- the collision and joining of crustal fragments to a continent
- how did the same fossils appear on different parts of the world
- migration across land bridges
- what is S wave not transmitted through
- outter core
- what is used to make short term predictions about up comming earthquakes
- strain in rocks near faults
- new ocean is crust is formed by
- divergent boundaries
- elastic rebound hypothesis
- explains the release of energy during an eathquake
- where are most transform faults
- joining two segments of a mid-ocean ridge
- according to paleomagnetism...
- iron-rich rocks show the location of the magnetic poles as the time of their formation
- pahoehoe
- not pyroclastic
- liquefaction
- sediments saturated with liquid cause solid to turn into fluid
- volcanoe bomb
- piece of semi-molten rock ejected as glowing lava
- divergent plate boundry at two ocean plates can result in a____
- rift valley
- according to plate tetonics_____
- the lithosphere is divided into plates
- what supports the idea of continental drift
- fossil evidense
- what would be most damaged by a 6.8 earthquake
- area with older brick structures
- a building that settles unevely after an earthquake is evidence of
- liquifaction
- size of volcanoes cone
- does not affect how large the eruption is
- what hyothesis states that the continents were once joined to form a single supercontinent
- continental drift
- a tsunami can occur when there is a vertical movement at a fault under
- the ocean floor
- travel-time graph
- finds distance to epicenter of an earthquake
- what is inbetween the crust and core
- the mantle
- paleomagnetism
- supports continental drift
- fault-block mountain
- large blocks of crust are uplifted along normal faults
- what affects the amount of destruction after an earthquake
- the intensity and duration of vibrations
- evidence about anciet climates indicates that
- glacial ice once covered much of what is now India and Austrailia
- moho
- boundry between crust and mantle
- ash
- pyroclastic
- 5.4 on richter scale compared to 4.4
- 10 times for violent
- how is an earthquakes magnitute measured
- size of seismic waves it produces
- as temp of lava increases
- viscosity increases
- long range earthquakes are based on the assumption that they are _____
- repetitive
- red sea is theorized to be the site of recently formed ____
- divergent boundry
- hawaiin islands were formed when the pacific plate moved over
- a hot spot
- the most widley used scale by scientists for mesuring earthqauakes
- moment magnitude scale
- continental volcanic arcs
- associated with convergent oceanic-continental boundary
- how does the age of seafloor sediments change with increasing distance from the ocean ridge
- age increases
- the ricther scale magnitude is determined from the
- measurement of the amplitute of the larges seismic waves
- volcanic island arcs are associated with what
- convergent oceanic-oceanic boundary
- waht do the strips of low-intensity magnetism represent on the ocean floor
- areas where the rocks have a reserved polarity
- convergent boundry
- when two plates come together and one subducts
- becuase of isostacy mountains will eventually ____
- be eroded to near sea level
- tsunami
- often generated by movements of the ocean floor
- highly explosive volcanoes have what type of magma
- magma with high silica, high viscosity, and higher gas content