January 29, 2015
What are icicles?
Icicles are what form when snow starts to melt and runs off of a roof or tree branches or something that is slanted into an area that has the temperature below water's freezing point. Then, it refreezes, forming a icicle.

Icicles.jpg
http://en.wikipedia.org/wiki/Icicle#mediaviewer/File:Icicles.jpg


January 29, 2015
What causes lightning?
Lightning happens when ice and liquid above freezing level slam into each other and create static electricity. Once the fields become large enough, it sparks, creating lightning.

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http://www.lightningsafety.noaa.gov/photos.htm