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Clear your desks and get ready for the final part of your unit test.

Clear your desks and get ready for the final part of your unit test. Data Entry. Go to bell- science.com Scroll over “Earth/Environmental Science” Scroll over “Semester 1” Click “Unit 1 Our Universe”

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Clear your desks and get ready for the final part of your unit test.

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  1. Clear your desks and get ready for the final part of your unit test.

  2. Data Entry Go to bell-science.com Scroll over “Earth/Environmental Science” Scroll over “Semester 1” Click “Unit 1 Our Universe” Scroll to the bottom of the page and open “Unit 1 Pre-test analysis”, complete the form using your pre-test Then open “CosmologyTest Analysis”, complete the form using your Cosmology Test

  3. Test Corrections • You will be given 15 minutes to use your notes and correct any incorrect answers. For each correction you must also explain why that answer is correct (explain the science in your own words) • You have until next Wednesday (9/24) • You may come in during • Homeroom Friday • Before school any day • After school Thurs, Fri, Mon, Tues

  4. Our Sun

  5. http://www.fromquarkstoquasars.com/galaxy-classifications-from-dwarfs-to-spirals-and-beyond/http://www.fromquarkstoquasars.com/galaxy-classifications-from-dwarfs-to-spirals-and-beyond/

  6. Where are we? http://nineplanets.org/ http://upload.wikimedia.org/wikipedia/commons/0/0f/Earth%27s_Location_in_the_Universe_SMALLER_%28JPEG%29.jpg

  7. Our Sun http://www.nasa.gov/images/content/524990main_FAQ10_full.jpg • How did it form? • Basic facts • 99.8% of mass • 100x diameter of Earth • 5,527oC • 92.1% H, 7.8% He • Plasma • Sun today • Main source of Earth’s energy

  8. How do we get the Sun’s energy? • Definitions • Thermal energy • Temperature • Heat • Types of heat • Occur in different parts of the Sun • Core • Dense, hottest • Hydrogen fusion • Conduction

  9. Radiation Zone • Radiation • Energy transfer (heat) • Light waves • Also how energy gets to Earth • Energy moves slowly • Thick layer

  10. Convection Zone • Uses convection • In liquids and gases • Material heated (conduction) • Rises….why? • Sinks….why? • Repeat • Moves more quickly in this layer

  11. Daily Review #1 • Video • Write down your observations • Why did that happen?

  12. Outer Solar Structure • Photosphere • Visible surface • Chromosphere • Red • High speed gas • Corona • Hot • Outermost layer • Seen during an eclipse

  13. Surface Feature Basics http://www.space.com/11506-space-weather-sunspots-solar-flares-coronal-mass-ejections.html http://oneminuteastronomer.com/1018/sunspots/ • Sunspots • Dark • Cold • Solar flares • High energy • Explosive • Prominence • Loops/arches http://spacefellowship.com/news/art21967/the-strange-case-of-solar-flares-and-radioactive-elements.html

  14. Sun’s Magnetic Field http://www.cbsnews.com/8301-205_162-57597396/ • What is a magnetic field? • What causes a magnetic field? • On the Sun? • Effect of rotation • Different rotation rates • Magnetic field lines get wound up • Eventually snap • Causes a solar flare • Solar prominences • Follow magnetic field lines into space

  15. Sunspots • Cooler than nearby areas • Appear in pairs • Intense magnetic field • Lines go out and in

  16. Solar Wind http://stereo.gsfc.nasa.gov/browse/2013/10/14/index.shtml • Hot, high speed, plasma streams • Corona expanding • Coronal Mass Ejections (CME) • Massive eruption • Rearrangement of magnetic field lines • One hit on 10/15/13 • Effects on Earth • Disrupt magnetic field shape • Danger to astronauts • Damage electronics • Aurora

  17. Sunspot Cycle • Predictable cycle • 11-years • Minimums • Last = 2008 • Low # of prominences, flares and sunspots • Cooler climate on Earth • Next maximum = 2013

  18. Aurora http://www.public.iastate.edu/~sdk/fick2003/october.html • Borealis or Australis • Interaction of particles and magnetic field • Particles drawn to poles • Colors • Elements • Altitude • Constantly changing • Video http://news.nationalgeographic.com/news/2011/09/pictures/110930-northern-lights-aurora-borealis-bright-colors/#/space163-aurora-borealis-from-space_41077_600x450.jpg

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