is there l ife o ut t here? our solar system (and beyond)
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Is There L ife O ut T here? Our Solar System (and beyond). Draw a picture of what you think life would look like on another planet, if it existed. Describe why you drew that image. What makes Earth a great place for life?. - PowerPoint PPT PresentationTRANSCRIPT
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Is There Life Out There? Our Solar System (and
beyond)• Draw a picture of what you think life
would look like on another planet, if it existed.
• Describe why you drew that image.• What makes Earth a great place for
life?
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Universe
•Milky Way (spiral)
Galaxy
Solar Syste
m
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/
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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
Our Sun
http://www.nasa.gov/images/content/524990main_FAQ10_full.jpg
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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 Sun’s energy?
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Radiation Energy transfer
(heat) Light waves Also how energy
gets to Earth Energy moves
slowly Thick layer
Radiation Zone
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1. Video Write down your observations Why did that happen?
2. How are conduction and radiation similar?
3. Give a real-life example of conduction, and radiation making an object warmer.
4. What is something surprising that you learned about the Sun?
Daily Review #1
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Convection Zone
Uses convection In liquids and gases Material heated
(conduction) Rises….why? Sinks….why? Repeat Where else does
this happen? Moves more
quickly in this layer
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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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Dark Cooler than
nearby areas
Appear in pairs
Sunspots
http://oneminuteastronomer.com/1018/sunspots/
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5. Complete sun structure worksheet, except #9 and 10
6.Describe the difference between radiation, convection and conduction.
Daily Review #2
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http://www.electronics-tutorials.ws/electromagnetism/magnetism.html
What is a magnetic field?
What causes a magnetic field? Organized
charged particles In the Sun?
Because it’s a plasma
Constantly changes
Sun’s Magnetic Field
http://www.cbsnews.com/8301-205_162-57597396/
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Intense magnetic field Lines go
out and in
Sunspots and Magnetic Field
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Predictable cycle 11-years
Next maximum = 2013, very weak
Minimums Last = 2008/2009 Also low # of
prominences, flares Cooler climate on Earth
Sunspot Cycle
http://academic.emporia.edu/aberjame/student/johnson5/sunspotcycle.html
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Different rotation rates
Magnetic field lines get wound up
Rotation and Magnetic Field Lines
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Solar flares High energy Explosive Twisted until it
snaps Prominence
Reversal of poles in that area
Follow magnetic field lines into space
Loops/arches
Surface Features – Disturbances of the
Magnetic Field
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
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Coronal Mass Ejections Massive eruption Rearranges magnetic field
lines One hit on 9/16/14 Effects on Earth
Danger to astronauts Damage electronics
Satellites Electrical system
CME
http://stereo.gsfc.nasa.gov/browse/2013/10/14/index.shtml
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Hot, high speed, plasma streams
Corona expanding Constant
Particles constantly hitting Earth
Disrupt magnetic field shape of Earth
Create aurora
Solar Wind
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Borealis or Australis Interaction of
particles and magnetic field Particles drawn to
poles Colors
Elements Altitude
Constantly changing
Intensified after CME
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