1. http://environment.nationalgeographic.com/environment/natural-disasters/lightning-interactive/ Lightening Click on the blue box to learn about lightening. When lightening strikes.... Lightening strikes the Earth about _________ times a second. Each strike can heat the air around it ______ times the temperature of the Sun's surface. 10 100 1,000 1 5 10

2. Lightening Anatomy of a Thundercloud Lightening is an ___________ discharge. Sheet lightening is a bolt of lightening that lights up the ______ of a cloud. battery electrical strike base

3. Lightening Charging Up During a storm, particles withing a cloud _______. Positive charges ______ to the rop of the cloud while negative charges _____ to the bottom of a cloud. evaporate collide sink rise

4. Lightening Lightening bolts A lightening bolt begins when _______ charges race downward along a channel. The bold nears the ground it is met by _______ charges that rise through building, trees, or people. positive negative positive negative When the two charges connect, an electric ________ flows towards the Earth and creates a flash. field current