Prelim 2 is in 2 weeks Next weeks

Prelim 2 is in 2 weeks • Next week’s section will be a review • Assignment : send me 2 topics/ questions you want me to review – Email them to me by Sunday at 2 pm – This counts towards today’s section grade

Tectonics in action Over the weekend, there was a magnitude 8. 8 earthquake in Chile. There have been over 150 aftershocks magnitude 5. 0 or greater, including 8 of magnitude 6. 0 or greater. 1 The quake originated 35 km below the surface of the Earth. 2 If you would like to help, check this link: http: //www. astro. cornell. edu/~babs/howtohelpchile. html http: //earthquake. usgs. gov/earthquakes/eqinthenews/2010/us 2010 tfan/#summary 2 http: //earthquake. usgs. gov/earthquakes/eqinthenews/2010/us 2010 tfan/#details 1

http: //earthquake. usgs. gov/earthquakes/aftershocks/? code=2010 tfan&source=us&title=M 8. 8%20 -%20 Offshore%20 Maule, %20 Chile

Earth’s atmosphere Gas Name Chemical Formula Percent Volume Nitrogen N 2 78. 08% Oxygen O 2 20. 95% *Water H 2 O 0 to 4% Argon Ar 0. 93% CO 2 0. 0360% Neon Ne 0. 0018% Helium He 0. 0005% *Methane CH 4 0. 00017% Hydrogen H 2 0. 00005% N 2 O 0. 00003% O 3 0. 000004% *Carbon Dioxide *Nitrous Oxide *Ozone From http: //www. physicalgeography. net/fundamentals/7 a. html * variable gases

The Greenhouse Effect http: //www. fas. org/irp/imint/docs/rst/Sect 16_2. html

Origin of the Moon • • Sisters? Fission? Capture? Giant impact

Mercury: Caloris Basin Image from http: //messenger. jhuapl. edu/gallery/science. Photos/image. php? page=2&gallery_id=2&image_id=149

Mercury’s day and year • 3 days every 2 years • Animations…. – Rotation and orbit: http: //www. messenger-education. org/Interactives/ANIMATIONS/Orbit_Rotation/orbit_rotation_full. htm – The Sun in the sky: http: //www. messenger-education. org/Interactives/ANIMATIONS/Day_On_Mercury/day_on_mercury_full. htm

Mercury’s interior Image from http: //www. daviddarling. info/encyclopedia/M/Mercury. html

2009: The first global map of Mercury! Image from http: //messenger. jhuapl. edu/gallery/science. Photos/image. php? page=1&gallery_id=2&image_id=345

Venus Visible UV Radar Images from http: //photojournal. jpl. nasa. gov/catalog/PIA 10124, http: //atmos. nmsu. edu/~nchanove/A 105 S 04/lecture_21. html, and http: //nssdc. gsfc. nasa. gov/image/planetary/venusglobe. jpg

The Venusian surface Images from http: //www. mentallandscape. com/C_Catalog. Venus. htm

Backup slides

The Moon’s interior http: //www. astro. psu. edu/users/niel/astro 1/slideshows/class 41/slides-41. html

http: //geophysics. ou. edu/solid_earth/notes/seismology/seismo_interior. html

Earth’s interior, cont. P wave S wave http: //geophysics. ou. edu/solid_earth/notes/seismology/seismo_interior. html

Surface Processes • • Erosion Tectonics Volcanism Impacts Images from http: //fireflyforest. net/firefly/2005/11/12/aerial-view-of-the-grand-canyon/, http: //www. scientificamerican. com/article. cfm? id=geologists-link-the-great, http: //rst. gsfc. nasa. gov/Sect 18_1. html, and http: //users. forthnet. gr/ath/nikolas_c/tectonic_geoology. htm