Term
|
Definition
-Cones of Cinders
-2,500 ft. high
-Common in CA or OR
-Produces smoke and cinders |
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Term
|
Definition
-Alternate layers
- Up to22,000 ft.
-Common around pacific slope |
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Term
|
Definition
-Very gentle slopes
-Formes Lava w/ low viscosity
-13,680 ft. above sea level
-16,400 ft. above sea floor
-Total=30,080 ft. high!!!
-"LOL"=Lots of lava |
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Term
|
Definition
-"Stony Rough"
-High viscosity
-1,800 ft. high
-Moves slowly (lava)
-Cool slowly (lava) |
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Term
Pahoehoe Volcanoes
(ropey volcanoes) |
|
Definition
-Smooth and "un-broken"
-Low viscosity
-2,100 + ft.
-Moves xtremly fast
-Cools (lava) sloppily |
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Term
|
Definition
-Magmarich in feldspar and silica
-Lightly colored
-Usually produces thick, viscous lava (Aa') |
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Term
|
Definition
-Magma rich in magnesium and iron
-Dark colored
-Usually produces thin, runny lava (pahoehoe)
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Term
|
Definition
-Ash
-Smoke and steam
-Airborne lava
-Flowing lava |
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Term
|
Definition
Boundary between tectonic plates
that are moving away from
eachother. |
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Term
|
Definition
The boundary between tectonic
plates that are cooleding. |
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Term
|
Definition
The boundary between tectonic
plates that are sliding past
eachother horziontally. |
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Term
|
Definition
-800 miles thick
-36,000 miles below surface
-9,000* f.
-Pressure=3,000,000(surface pressure)
-Solid: Ni-Fe alloy(nickle and iron mixed) |
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Term
|
Definition
-1,400 miles thick
-1,800 miles below surface
-Ni-Fe
-Less pressure than inner core
-4,000-9,000*f
-Liquid |
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Term
|
Definition
The solid, outher layer of Earth that
consists of the crust and the rigid
upper part of the mantle. |
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Term
|
Definition
Solid, plastic layer of the mantel beneth
the lithosphere; made of mantel rock that
flows very slowly, which allows tectonic
plates to move on top of it. |
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Term
|
Definition
The "crust" (outer layer we live on)
of the Earth. |
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Term
|
Definition
| Composed of iron, magnesium, aluminum, silicon, and oxygen. At over 1,000 degrees C, the mantle is solid but can deform slowly in a plastic manner. |
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Term
|
Definition
-Primary waves
-Move parallel
-Fastest seismic waves
-Travels through: solids, liquids, and gases |
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Term
|
Definition
-Secondary wave
-Side-to-side
-Only travel through solids
-Second fastest seismic waves
-4s's(secondary,side,solids,seismic) |
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Term
|
Definition
| A seismic wave that travels through an object |
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Term
|
Definition
| A wave that travels on the surface of an object |
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Term
|
Definition
-Moves through surface in rolls
(rolling=rayleigh) |
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Term
|
Definition
-Moves through the surface back and
forth in a swaying motion |
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|
Term
| Where do earthquakes occur? Why? |
|
Definition
Usually on fault lines
Because that is where the plates
meet and push together. |
|
|
Term
| How are earth quakes detected and measured? |
|
Definition
Measured on Richter and Mercalli Scale
(usually richter)
Seismografic sensors in the ground |
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