Lightning 2/11/14 To insert this slide into your presentation

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Lightning 2/11/14 To insert this slide into your presentation Save this template as a presentation (.ppt file) on your computer. Open the presentation that will contain the image slide. On the Slides tab, place your insertion point after the slide that will precede the image slide. (Make sure you don't select a slide. Your insertion point should be between the slides.) On the Insert menu, click Slides from Files. In the Slide Finder dialog box, click the Find Presentation tab. Click Browse, locate and select the presentation that contains the image slide, and then click Open. In the Slides from Files dialog box, select the image slide. Select the Keep source formatting check box. If you do not select this check box, the copied slide will inherit the design of the slide that precedes it in the presentation. Click Insert. Click Close.

Bellwork What are the three ways to charge an object? Friction Contact Induction

Video http://videos.howstuffworks.com/discovery/406-discovery-wonders-of-weather-lightning-phenomena-video.htm

Lightning Charge separation within the cloud Positive charges at the top of the cloud Negative charges at the bottom of the cloud Clouds charge the ground by induction Step Leaders – come from the cloud (many kilometers long) Streamers – form from ground objects (only meters long)

Types of Lightning Intra-Cloud (~80%) Cloud to Ground (~20%) Negative (18%) Positive (2%) Cloud to Cloud and Cloud to Air (rare)

Negative vs. Positive Lightning Negative Lightning Positive lightning

Negative and Cloud to Cloud Lightning Intra-Cloud Lightning Negative Lightning

Positive Lightning

The Sound of Thunder Lightning heats up the air quickly (30,000 K) causing the air to rapidly expand. This is the sound that we hear.

Lightning Videos http://www.youtube.com/watch?v=dukkO7c2eUE (slow motion) http://www.youtube.com/watch?v=8waV48897o4 (slow motion) http://www.youtube.com/watch?v=RDDfkKEa2ls (upwa http://www.youtube.com/watch?v=kYguAFZwhpUrd lightning)

End of Notes Alternative Pictures Follow