There are two that I like. 1. The fire breathing pumpkin: Basically carve a pumpkin as you usually would and cut a small hole in the back of it. Stick some tygon tubing in the hole and leave about 3 or feet of tubing sticking out of the pumpkin. Place a candle inside the pumkin. Using a funnel, pour some lycopodium powder in the tubing (no more than a couple grams will be necessary). Flour or powdered creamer will work. Light the candle on the inside and replace the lid. Blow through the tube and fire will burst through the front of the pumpkin.
2. Genie in a Bottle: Obtain some 12% or 30% Hydrogen peroxide. Pour about 30-40 mL into a flask with a lid. Next take about a gram of MnO2 or KI and place it in the middle of a chem-wipe or a piece of kleenex. Bundle it up with string so that it looks like a tea bag. Leave one end of the string long. Place the 'tea bag' inside the bottle with the string hanging out so that it doesn't fall all the way in. Use the cap to secure it. Tell your students you are going to unleash the power of genie and remove the cap. The bag will fall in, and a large plume of steam will pour out of the bottle. It will get pretty hot. It works great if you cover the bottle in aluminum foil, so that its contents are a mystery. Here is a link for some more good ones. http://www.thecatalyst.org/forum/halloween/demos_list.html Mike Davis Science Theatre Productions www.stproductions.net [EMAIL PROTECTED] (773)343-2500 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED] Sent: Monday, October 22, 2001 1:01 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: [CPS Science]Re: Halloween Chemistry Demos Hi - I know that last year someone circulated a list of several fun, easy "Halloweeny" demos for chem classes on this listserve. Unfortunately I misplaced mine. Does anyone still have a copy of it? I am mostly interested in demos that use readily available chem materials (ie not dry ice or Mercury chloride). Thanks, Alison Terczak -- This is the CPS Science Teacher List. To unsubscribe, send a message to <[EMAIL PROTECTED]> For more information: <http://home.sprintmail.com/~mikelach/subscribe.html>. To search the archives: <http://www.mail-archive.com/science%40lists.csi.cps.k12.il.us/> -- This is the CPS Science Teacher List. To unsubscribe, send a message to <[EMAIL PROTECTED]> For more information: <http://home.sprintmail.com/~mikelach/subscribe.html>. To search the archives: <http://www.mail-archive.com/science%40lists.csi.cps.k12.il.us/>