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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
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what is sea floor spreading?
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the theory claiming that the mid-ocean ridge is a huge crack in the earths crust where the hot mantle pushes through and spreads the ocean floor apart.
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what is refraction?
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the bending of a wave caused by the by the change of speed that occurs when the wave moves from one medium to the other.
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what is relitive age?
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determining the age of a layer of sedimentary rock, or a fossil in such a layer, by comparing its position to other rocks layers around it.
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what is shear?
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type of stress where rocks in the earths crust are pushing in different horizontal directions.
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i MaDe ThIs A fReE oNe FoR yA!
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To GeT tO tHe OtHeR sIdE
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what is the richter magintude scale based on?
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the amout of shaking caused by an earthquake
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name the 3 types of seismic waves caused by an earthquake and describe each one.
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p (primary)-the fastest wave. travels by back and forth movement. can travle through water. squeezes and pulls rocks.
s (secondary)- slowest and arrives second at a seismic station. travels up and down. cannot travel through water. L- most desctrutive type of wave is created when the P and S waves meet at the surface. |
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name the 3 types of seismic waves caused by an earthquake and describe each one.
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p (primary)-the fastest wave. travels by back and forth movement. can travle through water. squeezes and pulls rocks.
s (secondary)- slowest and arrives second at a seismic station. travels up and down. cannot travel through water. L- most desctrutive type of wave is created when the P and S waves meet at the surface. |
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parts of a volcanoe
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crater- the steep hollowedout area surrounding a cent at the top of a volcanoe.
magma chamber- large pocket of magma pipe- crack in crust where magma moves. vent- where the magma emerges out of the vocanoe |
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the limit to how much stress a material can take
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elastic limit
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the LiMiT to how...
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who invented the theory of contenental drift?
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alfred wegener
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thrust fault
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hanging wall moves up in relation to the footwall due to compression
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stress
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force that act on the rocks of the earth's crust causing movement of the crust or a change in the shape or volume
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subduction
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when one plate moves under another
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seismic wave
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shock wave in the earth caused by an earthquake
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normal fault
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a fault where the hanging wall moves downward in relation to the footwall
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prefixes used in SI
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measurements unit symbol
kilo- 1,000 k hecto- 100 h deca- 10 da deci- 1/10 d centi- 1/100 c milli- 1/1000 m micro- 1/1000000 u |
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density=
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mass
---- volume |
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SI Based units
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measure unit/symbol
length meter/m mass kilogram/kg area spuare meter m2 volume liter/L tempature degrees cel. time seconds/s |
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moho
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boundary between the earths crust and mantle
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true or false istosatsy balances 2 forces
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true
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fissure
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large crack in the earth resulting from an earthquake
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independent variable
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changes the dependent variable
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infer
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to make a conclusion based on availiable data
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geological time
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time scale of the history of the earth and its life
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