Science ch. 5
Terms
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- Mantle
- above the outer core
- depth of mantle
- 2900 km
- mass of mantle
- 68%
- volume of the mantle
- 80%
- mantle consists of
- iron, silicon, oxygen, and magnesium
- What is the principal of the mantle? and its definiton
- placisity and its the ability of a solid to flow like a liquid
- depth of the Moho
- 32 to 64 km
- crust
- outermost layer of the earth
- what are difinintions of the 3 rocks
-
igneous: form when lava cools and solidifies
Sedimentary rocks: ricks that form when sediments are cemented together - metamorphic rocks
- forms when Igneous rocks are changed by heat, pressure or chemical reactions
- What are the varies in thickness in the crust
- oceanic crust 8km ehile continental is 32 km
- Liposphere
-
solid outermost layer of the earth
topmost part of the man
broken into a number of plates which float and move on the asthemosphere - asthenosphere
- directly below the liposphere
- shadow zone
-
no seismic waves
found at 105- 140 from the earth's sourse - earthquake
- when earth's uppermost layer moves because shock waves carry energy through the earth
- seismic waves
-
Primary waves- travel through gasses, liquids and solids
secondary waves- travel through solids - seismograph
- instrument that detects and records seismic waves
- What is depth of earth's inner core?
- 5150 km
- diameter of inner core
- 2600 km
- what does the earth's inner and outer core consist of?
- iron and nickel
- Outer core depth
- 2900 km
- thickness of outer core
- 2250 km
- temperature of outer core
- 2200 and 500 degrees celcius
- South-trending drift
- brings sediments from North of Cape Hatteras and deposits them on the shelf of back into the Gulf Stream
- Gulf Stream
- flows from the South West to the Northeast. This strong current prevents sediments from being deposited on the continental shelf, pushing them onto the continental slope and rise
- Deep Western Boundary Undercurrent
- flows southwest opposite and underneath the Gulf stream. Sediment from this current is deposited on the continental slope and rise.