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Lightning results from the buildup and discharge of electrical energy between positively and negatively charged areas.
Rising and descending air within a thunderstorm separates these positive and negative charges.

Lightning - Wikipedia

en.wikipedia.org/wiki/Lightning

Lightning is a sudden electrostatic discharge that occurs during an electrical storm. .... The best studied and understood form of lightning is cloud to ground ( CG). Although more common, intracloud...

How Lightning Forms | UCAR Center for Science Education

scied.ucar.edu/webweather/thunderstorms/how-lightning-forms

How Lightning Forms ... Lightning happens when the negative charges (electrons ) in the bottom of the ... It is at that point that we see lightning and hear thunder. ... and do not necessarily reflect the views of the National Science Foundation.

What causes lightning? - Planet Science

www.planet-science.com/categories/over-11s/natural-world/2012/06/what-causes-lightning.aspx

How does lightning form? Lightning is an electric current. To make this electric current, first you need a cloud. When the ground is hot, it heats the air above it.

www.ask.com/youtube?q=How Does Lightning Form?&v=CA5eW8dnPF4
Feb 15, 2013 ... In this video Foundation Scientist Graeme Anderson explains how lightning forms , different types of lightning such as thunder snow, and how ...

NASA - How Is Lightning Made?

www.nasa.gov/audience/forstudents/k-4/home/F_What_Causes_Lightning_Flash.html

Dec 9, 2007 ... Image above: How would you explain lightning? ... He wanted to prove that lightning is a form of electricity. ... How does this "electricity" form?

NWS JetStream - How Lightning is Created

www.srh.noaa.gov/jetstream/lightning/lightning.html

However, exactly how lightning forms has never been verified so there is room for debate. ... However, this does not always mean tall objects will be struck.

How does lightning form? | Reference.com

www.reference.com/science/lightning-form-4b7073c639fcff9c

Lightning forms when the electrons in the bottom of a cloud are attracted to the protons in the ground. When the attraction of these electrical charges is greater ...

Lightning - Weather Wiz Kids weather information for kids

www.weatherwizkids.com/weather-lightning.htm

The positive charges or protons form at the top of the cloud and the negative charges ... Do not lay flat, because it can give lightning a better chance of strike you.

What is lightning? - science made simple

www.sciencemadesimple.co.uk/activity-blogs/lightning

May 23, 2012 ... How is lightning formed? ... 'Streamers' come up from the ground to form a pathway. ... Here is a slow motion video of lightning. ... You can find out more about what we do, book us live in action with one of our exciting shows, ...