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what powers the water cycle?
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aquifer and it purpose, and what it allows water to do?
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difference between a well and a spring.
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sources of ground water polution
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what type of rock allows percolation
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why shouldn't we build on flood plains?
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point of sewage treatment plants
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relation between temperature and saturation.
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what causes coriolis effect
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label diagram of the water cycle
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a shield volcano
has gently sloping sides
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a cinder cone volcano
has steepp slopes
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a combination of explosive and nonexplosive eruptions will create a
composite volcano
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a large depression that forms when the magma chamber partially empties is a
caldera
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what describes subduction
movement of one tectonic plate under another
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where are volcanoes most likely to form?
along plate boundaries
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most active volcanoes form
where tectonic plates collide.
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when an oceanic plate collides with a continental plate, the oceanic plate is usually subducted because
oceanic crust is denser and thinner then continental crust
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the volcanoes of Hawaii and other places far from tectonic plat boundaries are known as
Hot spots
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Volcanic activity is common along the Mid-atlantic ridge. This activity occurs at a
divergent boundary
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what are areas of earths surface that magma and gases pass through
volcanoes
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what is pyroclastic material
magma that blasts into the air and hardens
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what is a rift.
a crack in the earths crust
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molten rock deep underground often gathers in a
magma chamber
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Mount Rainier and Mount St. Helens are
composite volcanoes
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tectonic plates "float" on
the asthenosphere
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magnetic reversals are preserved in
magnetic minerals
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mid-ocean ridges are the most common type of
divergent boundary
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what siesmic waves do the greatest damages
surface waves
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what type of boundary is formed when plates separte
divergent
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what kind of deformation leads to earthquakes
elastic deformation
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what causes the ground to move during an earthquake
elastic rebound
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Shield Volcano
- -built out of layers of lava released form repeated nonexplosive eruptions.
- -lava is very runny so it spreads out over a wide area.
- -can be enormous, not very steep
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cindercone volcanoes
- - they are made from pyroclastic material
- steep slopes
- small and only last for a short amount of time due to erosion
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composite volcanoes
- strato-volcano
- form from explosive eruptions of pyroclastic material
- followed by quieter flows of lava.
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what does nimbo or nimbus mean?
likely to produce rain
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what does cirro mean?
clouds that form at high altitudes
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alto
clouds that form at middle lattitudes
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cumulonimbus
dark storm clouds likely to have rain
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altostratus
middle clouds made from water drops or ice crystals
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cirrostratus
high whispy cloud at about 7,000 m.
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cumulus clouds
puffy white clouds that tend to have flat bottoms
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stratus clouds
clouds that form in layers and cover large areas of the sky
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cirrus clouds
thin feathery white clouds found at high altitudes
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composition of the earth
- 78% nitrogen
- 21% oxygen
- 1% other
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igneous
1.intrusive
2. extrusive
- 1. found in ground, magma slow cooling, very rough texture many crystals,
- 2. above ground, lava fast cooling, very smooth.
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magma vs. lava
- magma inside intrusive
- lava outside extrusive.
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metamorphic
- 1. foliated
- 2. organized in bands or patterns
- 3. non foliated, no patterns or bands
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