What is lightning?

Here are some links about what lightning is and how it is formed.

http://www.pa.msu.edu/sciencet/ask_st/062994.html

http://local.msn.com/weather-101/how-does-lightning-form

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



Here are some articles about lightning, stem and weather:

http://www.stem-works.com/external/article/972



Here are a few extra activities:

http://www.cocorahs.org/Media/docs/LessonPlans/4h/4h-what-is-lightning.pdf