slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Lightning PowerPoint Presentation
Download Presentation
Lightning

Loading in 2 Seconds...

play fullscreen
1 / 28

Lightning - PowerPoint PPT Presentation


  • 108 Views
  • Uploaded on

Lightning. Power point created by Robert Martinez Primary Content Source: National Geographic Images as cited. http://environment.nationalgeographic.com/environment/natural-disasters/lightning-profile/.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

Lightning


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Lightning

Power point created by Robert Martinez

Primary Content Source: National Geographic

Images as cited.

http://environment.nationalgeographic.com/environment/natural-disasters/lightning-profile/

slide2
Cloud-to-ground lightning bolts are a common phenomenon—about 100 strike Earth’s surface every single second—yet their power is extraordinary.

http://schools.sd68.bc.ca/fore/ireland/2006/jr/cloud%20to%20ground%20lightning.jpg

slide4
Each bolt can contain up to one billion volts of electricity.

http://www.harkphoto.com/051803lightning.jpg

slide6
This enormous electrical discharge is caused by an imbalance between positive and negative charges.

http://www.lanl.gov/news/albums/safety/lightning_bolt.sized.jpg

http://extend.schoolwires.com/clipartgallery/images/32255088.jpg

slide8
During a storm, colliding particles of rain, ice, or snow increase this imbalance and often negatively charge the lower reaches of storm clouds.

http://www.flickr.com/photos/10093223@N03/4541103706/

slide9
Objects on the ground, like steeples, trees, and the Earth itself, become positively charged—creating an imbalance that nature seeks to remedy by passing current between the two charges.

http://www.flickr.com/photos/jaredryanlee/3637911858/

slide10

http://www.acceleratingfuture.com/michael/blog/images/lightning_strike.jpghttp://www.acceleratingfuture.com/michael/blog/images/lightning_strike.jpg

slide11

http://www.neatorama.com/images/2006-10/lightning-bolt-hits-house.jpghttp://www.neatorama.com/images/2006-10/lightning-bolt-hits-house.jpg

slide12
A step-like series of negative charges, called a stepped leader, works its way incrementally downward from the bottom of a storm cloud toward the Earth.

http://www.flickr.com/photos/bluelunarrose/3010025597/

http://i.pbase.com/g6/54/14154/2/1516340.kyAR8E1g.jpg

slide13
Each of these segments is about 150 feet long.

http://www.just-whatever.com/wp-content/uploads/2008/12/lightning_strike_18.jpg

slide14
When the lowermost step comes within 150 feet of a positively charged object it is met by a climbing surge of positive electricity, called a streamer, which can rise up through a building, a tree, or even a person.

http://www.lightningsafety.com/nlsi_info/leader.gif

slide15
The process forms a channel through which electricity is transferred as lightning.

fbcoem.org

http://www.flickr.com/photos/aristides2/3768393920/

slide16
Some types of lightning, including the most common types, never leave the clouds but travel between differently charged areas within or between clouds

http://www.flickr.com/photos/streamer_yam/4302628561/

slide17
Other rare forms can be sparked by extreme forest fires, volcanic eruptions, and snowstorms.

http://www.flickr.com/photos/ethanhein/2253205808/

slide20
Ball lightning, a small, charged sphere that floats, glows, and bounces along oblivious to the laws of gravity or physics, still puzzle scientists.

http://www.insidesmusic.com/insidesvideo/images/ball-lightning.jpg

slide22
Lightning is extremely hot—a flash can heat the air around it to temperatures five times hotter than the sun’s surface.

http://sunearthday.nasa.gov/2007/images/gal_012.jpg

slide24
This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.

http://australiasevereweather.com/photography/photos/2008/1014jd27.jpg

slide25

http://www.lightningsmiths.com/lightning_fineart02/lightning_water.jpghttp://www.lightningsmiths.com/lightning_fineart02/lightning_water.jpg

slide26
Lightning is not only spectacular, it’s dangerous. About 2,000 people are killed worldwide by lightning each year.

http://www.crh.noaa.gov/ilx/lightning/Ltg_deaths.jpg

slide27
Hundreds more survive strikes but suffer from a variety of lasting symptoms, including memory loss, dizziness, weakness, numbness, and other life-altering ailments.

This lady was burned at a

rock concert at RFK stadium.