About

I made ScienceFix.com to share my favorite demos that I do in my middle school science classes.  

Contact Me
Search ScienceFix.com
Twitter
Delicious
Media that I like...
  • Something Funny Happened on the Way to the Moon
    Something Funny Happened on the Way to the Moon
    by Sara Howard
  • NOVA - Origins
    NOVA - Origins
    starring Neil Degrasse Tyson
  • Human Body: Pushing the Limits
    Human Body: Pushing the Limits
    starring Bray Poor
« Video Demo: Disappearing Cup | Main | Video Demo: Glowing Penny »
Friday
Jun122009

Comet Demo

This is one of the few times that students have an opportunity to touch what an object in the Solar System is kind of like. This demo is very popular and can be found all over the Internet. The materials that are needed are shown in slide show (plus 2 large cups of water). Mix the water, sand, 1 tablespoon of corn syrup, and a dash of ammonia into the bowl (see slide show). These are the main ingredients of a comet. Of course the temperature needs to be decreased dramatically. Dry ice, frozen carbon dioxide, will do this and is also an ingredient. The dry ice needs to be placed into the double heavy duty trash bags (see slide show). Use the hammer to crush the dry ice into a powder (see slide show). Then carefully pour the dry ice into the plastic bowl (see slide show). Using the gloves shape the mixture into a ball (see slide show). Carefully remove the comet and let students touch it. The comet really is the nucleus of the comet–the solid part. Explain to the students that the Sun’s energy heats up the ice to form the gaseous coma, which can be seen in this demo.

BubbleShare: Share photos - Play some Online Games.

PrintView Printer Friendly Version

EmailEmail Article to Friend

Reader Comments

There are no comments for this journal entry. To create a new comment, use the form below.

PostPost a New Comment

Enter your information below to add a new comment.

My response is on my own website »
Author Email (optional):
Author URL (optional):
Post:
 
Some HTML allowed: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <code> <em> <i> <strike> <strong>