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Methane Bubbles
Methane Bubbles

Photograph Information Photographer's Comments
Challenge: School Days: Chemistry (Basic Editing III)
Camera: Canon PowerShot G2
Location: my HS science classroom
Date: Sep 11, 2006
Aperture: f2.0
ISO: 50
Shutter: 1/60
Galleries: Science and Technology
Date Uploaded: Sep 11, 2006

This demonstration on combustion reactions was performed during one of my science classes. This is how I did it:

1. Safety attire first: goggles, apron, long sleeves rolled back, and students with long hair had to tie it back.
2. Rubber tubing was attached to a gas jet at the lab table.
3. Methane gas was allowed to bubble through a solution of soap detergent, water, and a little glycerin contained in a beaker.
4. The bubbles of methane rose up out of the beaker (methane is lighter than air) and were scooped by hand.
5. A burning splint was used to ignite the bubbles.

I was unable to do much staging of this (other than making sure the periodic table was in the background) because I was more concerned with safety issues. The only lighting I had was the fluorescent lights in the room and the flash on my camera.

Post-processing in PS: adjustments in curves, saturation and contrast, crop, save for web, sharpen.

Place: 31 out of 90
Avg (all users): 5.7690
Avg (commenters): 6.8125
Avg (participants): 5.4054
Avg (non-participants): 5.8195
Views since voting: 8895
Views during voting: 601
Votes: 303
Comments: 16
Favorites: 1 (view)

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 Comments Made During the Challenge
09/19/2006 07:00:32 PM
Carefull, good capture... I'll call 911 now. Nice Shot
  Photographer found comment helpful.
09/19/2006 05:04:00 PM
Interesting picture - a little grainy in areas, and the focus is a bit soft.
  Photographer found comment helpful.
09/19/2006 04:59:15 PM
Great capture. I vote 9.
  Photographer found comment helpful.
09/19/2006 11:55:53 AM
  Photographer found comment helpful.
09/16/2006 01:35:26 AM
Somebody has been watching Myth Busters. Nice job.
  Photographer found comment helpful.
09/15/2006 09:18:25 PM
All I have to say is....


Quote un-quote.
  Photographer found comment helpful.
09/14/2006 08:38:03 PM
hope you tell us how to reproduce this awesome demonstration!
  Photographer found comment helpful.
09/13/2006 11:48:55 PM
wow! a real experiment!
  Photographer found comment helpful.
09/13/2006 11:46:31 PM
good thing youve got the glasses on, otherwise youd be at risk....
  Photographer found comment helpful.
09/13/2006 11:36:43 PM
Nice use of subject and color. Very creative!
  Photographer found comment helpful.
09/13/2006 09:31:51 PM
He needs a while look in his eye, but its a great flame. Needs something to make him pow as much as the flam does. Nice capture.
  Photographer found comment helpful.
09/13/2006 04:22:40 PM
This would of also worked in the "Stupid Stupid" challenge :)
  Photographer found comment helpful.
09/13/2006 04:05:20 PM
this must be nice to do
rather nasty reflection (flash?) on the periodic table in BG and flame a bit overexposed. but I quess, this is hard to get a good exposure of because of large dynamic range.
best of luck
  Photographer found comment helpful.
09/13/2006 10:51:47 AM
That looks like fun.
  Photographer found comment helpful.
09/13/2006 06:59:42 AM
Tough to argue that THIS meets the challenge :) ... This is pretty crazy and looks like a genuine scene from the classroom. This guy seems strangely calm!!! The only thing i might mess with is the white balance since there's a tint of yellow green in the background.
  Photographer found comment helpful.
09/13/2006 12:24:46 AM
  Photographer found comment helpful.

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