ASTR 1000 Lecture Notes - Lecture 14: Hot 3, Seismology, Black Body
19 Jun 2018
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Class 14
Terrestrial Interiors - the interiors of the planets are divided into layers - density.
•Crust - Layer of the earth that contains the solid continents and the seafloor.
•Mantle - layer of the earth just interior of the crust.
•Lithosphere - earths crust and small portion of the upper mantle that make up Earth’s plates.
This layer of Earth undergoes tectonic activity.
•Core - the central region of earth, surrounded by the mantle. The central region of any planet
or star. It is made up of iron and nickel.
•Seismograph (seismology) - the study of earthquakes and the waves they produce in the
Earth’s interior.
•S-waves - shear waves from an earthquake, which can travel only through solid material and
move more slowly than p-waves.
•P-waves - pressure waves from an earthquake that travel rapidly through liquids and solids.
•Chemical Differentiation
-Venus is just a scaled down version of the earth – but we aren’t quite sure, and to get this info
you have to be on the surface but Venus is so hot
-Reason why they star off molten — heat comes from accretion process.
Some material that forms in here is different densities
Chemical differentiation: As they go down they give off heat – give off heat energy – produces
heat internally. Many atoms are radio active isotopes – they give off heat.
Loose heat through processes
1.Radiation – at surface acts like blackbodies, radiates energy off into space
2.Conduction – heat will move from where its hot to not as hot
3.Convection – if acts like liquid or gas, expansion, becomes less dense, moves up and transfer
heat and goes back down again
Notes:
•The more violent the earthquake, the further the wave goes.
•Waves change their direction when the density of the material changes. These waves slowly
curve.
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
This layer of earth undergoes tectonic activity: core - the central region of earth, surrounded by the mantle. The central region of any planet or star. It is made up of iron and nickel: seismograph (seismology) - the study of earthquakes and the waves they produce in the. Earth"s interior: s-waves - shear waves from an earthquake, which can travel only through solid material and move more slowly than p-waves, p-waves - pressure waves from an earthquake that travel rapidly through liquids and solids, chemical differentiation. Venus is just a scaled down version of the earth but we aren"t quite sure, and to get this info you have to be on the surface but venus is so hot. Reason why they star off molten heat comes from accretion process. Some material that forms in here is different densities. Chemical differentiation: as they go down they give off heat give off heat energy produces heat internally.
