Transcript of Clear your desks and get ready for the final part of your unit test.
- Slide 1
- Clear your desks and get ready for the final part of your unit
test.
- Slide 2
- 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 Data Entry
- Slide 3
- 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
Test Corrections
- Slide 4
- Our Sun
- Slide 5
- Universe Milky Way (spiral) Galaxy Solar System
http://www.fromquarkstoquasars.com/galaxy-classifications-from-dwarfs-to-spirals-and-beyond/
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-
http://upload.wikimedia.org/wikipedia/commons/0/0f/Earth%27s_Location_in_the_Universe_SMALLER_%28JPEG%29.jpg
Where are we? http://nineplanets.org/
- Slide 7
- How did it form? Basic facts 99.8% of mass 100x diameter of
Earth 5,527 o C 92.1% H, 7.8% He Plasma Sun today Sun today Main
source of Earths energy Our Sun
http://www.nasa.gov/images/content/524990main_FAQ10_full.jpg
- Slide 8
- Definitions Thermal energy Temperature Heat Types of heat Occur
in different parts of the Sun Core Dense, hottest Hydrogen fusion
Conduction How do we get the Suns energy?
- Slide 9
- Radiation Energy transfer (heat) Light waves Also how energy
gets to Earth Energy moves slowly Thick layer Radiation Zone
- Slide 10
- Convection Zone Uses convection In liquids and gases Material
heated (conduction) Rises.why? Sinks.why? Repeat Moves more quickly
in this layer
- Slide 11
- 1.VideoVideo Write down your observations Why did that happen?
Daily Review #1
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- Photosphere Visible surface Chromosphere Red High speed gas
Corona Hot Outermost layer Seen during an eclipse Outer Solar
Structure
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- Sunspots Dark Cold Solar flares High energy Explosive
Prominence Loops/arches Surface Feature Basics
http://www.space.com/11506-space-weather-sunspots-solar-flares-coronal-mass-ejections.html
http://spacefellowship.com/news/art21967/the-strange-case-of-solar-flares-and-radioactive-elements.html
http://oneminuteastronomer.com/1018/sunspots/
- Slide 14
- 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 Suns Magnetic
Field http://www.cbsnews.com/8301-205_162-57597396/
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- Cooler than nearby areas Appear in pairs Intense magnetic field
Lines go out and in Sunspots
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- 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 Solar Wind
http://stereo.gsfc.nasa.gov/browse/2013/10/14/index.shtml
- Slide 17
- Predictable cycle 11-years Minimums Last = 2008 Low # of
prominences, flares and sunspots Cooler climate on Earth Next
maximum = 2013 Sunspot Cycle
- Slide 18
- Borealis or Australis Interaction of particles and magnetic
field Particles drawn to poles Colors Elements Altitude Constantly
changing Video Video Aurora
http://www.public.iastate.edu/~sdk/fick2003/october.html
http://news.nationalgeographic.com/news/2011/09/pictures/110930-northern-lights-aurora-borealis-bright-colors/#/space163-aurora-borealis-from-space_41077_600x450.jpg