CK-12-Physics-Concepts - Intermediate

16.3. References http://www.ck12.org

16.3 References

1. Courtesy of National Oceanic and Atmospheric Administration (NOAA). http://commons.wikimedia.org/wik
   i/File:Lightning_hits_tree.jpg.


2. Courtesy of NOAA Photo Library, NOAA Central Library; OAR/ERL/National Severe Storms Laboratory
   (NSSL). http://www.photolib.noaa.gov/htmls/nssl0016.htm.


3. Pixabay:OpenClips. Pullover: http://pixabay.com/en/jumper-pullover-sweater-jersey-150532/; Balloon: htt
   p://pixabay.com/en/balloon-green-circus-floating-150128/.


4. Christopher Auyeung. CK-12 Foundation.


5. Samantha Bacic. CK-12 Foundation.


6. Samantha Bacic. CK-12 Foundation.


7. Samantha Bacic. CK-12 Foundation.


8. Flickr:ellenm1. http://www.flickr.com/photos/ellenm1/6698266317/.


9. Samantha Bacic. CK-12 Foundation.