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Units of the Metric System
Millimeter, centimeter, meter, kilometer, gram, cubic meter, kelvin, second
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what is the difference between a mineral and a rock?
Rocks are made up of minerals
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Igneous rocks form when..
Lava/magma cools and crystallizes
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How are igneous rocks classified?
Basaltic, granitic, intermediate, ultrabasic
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Basaltic
Dark, low silica
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Granitic
Light, high silica
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Intermediate
in between basaltic and granitic
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Ultrabasic
contain only iron rich minerals
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Where do we look for valuable gems and ores?
Veins
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How does weathering affect sedimentation?
It produces rock and mineral fragments (sediments)
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How are sediments transported
Erosion
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Process of Deposition:
Sediments are transported and deposited on the ground or sink to the bottom of a body of water
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Coarse grained
conglomerates and breccias
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Clastic formed by..
Abundant deposits of loose sediments
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Biochemical rocks formed by..
Remains of once living organisms
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CHemical rocks formed by..
When water reaches saturation, crystals gains precipitate out and settle to the bottom
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Difference between foliated and non-foliated:
- Foliated rocks have wavy layers and bands of light and dark minerals
- Non-foliated rocks have minerals with blocky crystal shapes
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Explain the Rock Cycle:
- Heat and pressure turn sedimentary rocks into metamorphic rocks. The metamorphic rocks melt into magma, then cool and crystallize and form igneous rocks. Igneous rocks get uplifted, weathered and eroded which get turned into sediments, which then go though the processes of deposition, burial and lithification which get turned back into sedimentary rocks.
- *igneous rocks can undergo heat and pressure and turn into metamorphic rocks
- *metamorphic rocks can be uplifted to undergo weathering and erosion to become sediments to be turned into sedimentary rocks
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How does moving water carve a landscape?
It erodes away at the land, creating streams, rivers, watersheds, lakes, canyons, and stream valleys
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One way water can carry its load: Solution
Carrying method of transported sediments that are dissolved in a streams water
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One way water can carry its load: Suspension
Transportation method for small particles like silt, clay and sand.
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One way water can carry its load: Bed Load
Sediment that is too large or heavy to be held up by turbulent water. Consists of sand, pebbles, and cobble
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Factors that determine if precip. will become runoff or infiltrate:
Slope, vegetation, rate of precip., Soil composition, and infiltration rate
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Meander
Bend or curve in river
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Oxbow Lake
Stream begins to flow straight again after a lot of curves and deposits of sediments at the edge, cutting off a meander
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Alluvial Fan
When a stream gets closer to base level, it loses velocity and then flows into a flat area and drops sediment
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Delta
Deposit usually consisting of layers of silt and clay
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Maximum velocity (of stream)
on outside of stream
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Minimum Velocity (of stream)
On inside of stream
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Deposition (in stream)
Inside of the meander
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What threats exist to surface water
Pesticides, waste, laundry detergents, etc.
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How pollution affects a watershed:
Algae blooms, uses up oxygen, takes oxygen away from fish and plants in water, fish die, decaying fish take up more oxygen
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Overuse of groundwater
IF groundwater is pumped out at a rate greater than the recharge rate, the groundwater supply will decrease and the water table will drop
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Subsidence of groundwater
Excessive withdrawal of groundwater can also cause the sinking of land
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Pollution of groundwater
Sewage from faulty septic tanks and farms, landfills, and other waste disposal sites
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Process of sea-floor spreading
New ocean crust is formed at ocean ridges and then destroyed at deep sea trenches
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Divergent Boundaries
- Magma rises through cracks and gets pushed outwards
- features: rift valleys and trenches
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Oceanic-Oceanic Convergent
- Ocean plate is less dense and sinks beneath not-as-dense oceanic plate (subduction)
- Features: Ocean trenches and Volcanic Island arcs
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Oceanic-Continental
- Less dense oceanic plate descends beneath continental plate
- Features: Volcanic mountain ranges form along edge of continental plate and trenches
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Continental-Continental
- Continental crusts collide with one another and get pushed upwards
- Features: Mountains
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Transform Boundary
- Two plates slide past each other horizontally; crust is only deformed or fractured
- Features: Faults
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Major layers and compositions of each (of earth)
- Inner core- solid
- outer core- liquid
- mantle
- crust
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Shield Volcano
Broad gently sloping sides; forms from accumulating lava on Earth's surface; largest type of volcano, nonexlposive
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Cindercone Volcano
Ejected tephra in the air forms cindercones; steep sides; generally small
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Composite Volcano
Forms from layers of hardened lava alternating with layers of oozing lava; cone shaped; 2nd biggest; violent eruptions; cycle of quiet and explosive periods
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Basaltic Magma
50% or lower silica; low viscosity; quiet eruptions; fast flowing lava
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Andesitic Magma
50-60% silica; intermediate viscosity + eruptions; medium flowing lava
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Rhylitic Magma
60%+ silica; explosive eruptions; high viscosity; slow flowing lava
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Primary Waves (earthquake)
First set of waves; squeeze and push rocks; compression; goes through liquids and solids; pass through earth's interior; body waves; move back and forth
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Secondary waves (earthquake)
second set; slower then p-waves; move at right angles in relation to the direction of the waves; pass through earth's interior; body waves
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Surface waves
third set of waves; slowest; travel on the surface; move back and forth; move in two directions as they pass through rock; move up and down
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Factors that affect amount of damage caused by an earthquake:
ground type, structure of buildings, land and soil liquefaction
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What determines the probability of an earthquake
seismic risk, recurrence rate, seismic gap, and stress accumulation
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Describe how frequency and wavelength are related
low frequency has long wavelengths, and high frequency has short wavelengths
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Photosphere
Innermost of sun, visible layer, visible light emitted
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Chromosphere
Second layer of sun, usually only visible during solar eclipse, appears red, emits UV rays
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Corona
Outermost layer of sun, so dim because of very low density, only visible when photosphere is blocked, emits x-rays
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Prominence
Arc of gas ejected out of the chromosphere (sun fart)
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Solar flare
violent eruptions of particles and radiation from surface of the sun
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Solar wind
Charged particles (ions) flow from the corona.. **causes northern lights
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Sunspots
Suns magnetic field disturbs photosphere. Dark spots on the photosphere
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Coronal Hole
Only detected with x-rays, often located over sunspots. Solar wind escapes through
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How is energy produced in the sun?
Nuclear Fusion
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Five circumpolar constellations
ursa major, ursa minor, draco, cepheus, cassiopia
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12 constellations along ecliptic line
zodiac
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Brightness of star
depends on both the luminosity and distance from earth
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Luminosity of star
energy output of a star
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