Science Club
  1. Does Black Bark Mulch Help Keep Moisture in the Soil?
  2. How Much Water does a Fountain Use?
  3. Find your Body Surface Area
  4. How Fast do French Fries Cool Down?
  5. My Year of Coincidences
  6. Which Firework is the Loudest?
  7. Cost to store a VHS tape in a NYC apartment?
  8. Guess Your Blood Alcohol Level Booth
  9. Find the Loudest Restaurant in Sacramento
  10. How Much do Clothes Weigh?
  11. Trying to Make Clear Ice
  12. Searching the Indian Ocean for a Plane Crash
  13. Electronic Cigarettes - The Fog Machine for Your Face
  14. Scott Leased an Electric Ford Focus
  15. Testing the Effectiveness of a Beer Cozy
  16. Eggshells vs. Taco Shells
  17. How Ice Rinks are Made
  18. Shaken vs. Stirred
  19. Real Appliance Energy Use Tests
  20. Christmas Lights Power Cost
  21. The Best Cold Drink Cup
  22. LED vs. Regular Bulbs & CFLs
  23. Coldest drink in town?
  24. Using Salt to Cool Down Beer
  25. Coors Light Cold Indicator
  26. The Fastest Way to Cool Down Beer
  27. Hairdryer vs. Bowl of Water
  28. Bathroom During a Movie?
  29. Video Projector on a Disco Ball
  30. Cool Trunk
  31. The weight of popcorn
  32. Sunchips bag decomposition
  33. Disscating a cockroach
  34. Sensefly Drone Camera
  35. Entrance Locked
  36. End Rubbernecking
  37. Eyeclops Night Vision
  38. Miracle Fruit Taste Test
  39. Hot Air Bubbles
  40. Helium Bubbles
  41. Neighborhood Speed Trap
  42. Pizza Race
  43. Eyeclops - Bionic Magnifier
  44. Breathalyzer Testing
  45. Fishing Line Fiberoptics
  46. The Value of CFL Bulbs
  47. Barry Marshall Fan Page
  48. Bottling the Keg Leftovers
  49. Spinning Rim Centrifuge
  50. Backwash Experiments
  51. sidewalk chalk
  52. Red Hot Vioxx Action!
  53. Balloon Delivery
  54. Tanning
  55. Making a Candle Out of Lipstick
  56. Evaporation
  57. The lift of a Helium Balloon
  58. Lard Candle
  59. The Properties of Heat Transfer
  60. Insulation Testing
  61. Eating Out
  62. Eating In
  63. Tattoo Removal
  64. Drying Laundry
  65. Viscosity Testing
  66. Magazine Advertising
  67. Collecting Data
  68. Dropping Toast
  69. Refilling an Ink Cartridge
  70. Tampons
  71. Light Bulbs

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Trying to Make Clear Ice - page 2

Next I tried insulating the sides and the bottom of the container, forcing the ice to form from the top down. This would hopefully result in having the last bit of water being stuck at the bottom of the container. This is a 12-cup measuring cup. The gray insulation is more than an inch thick, and the bottom block of Styrofoam is two inches thick.


I used filtered water.

I left the water in the freezer overnight. In the morning, the ice was perfectly, perfectly clear! There wasn't a single bubble inside, below the ice.

No matter how I turned the container in the light, I couldn't tell if there was liquid water inside, or if it was solid ice. This looked extremely promising, but the only thing to do was to leave it in the freezer for a few more hours.

A few hours later, the victory was cancelled. A cloudy mass appeared as the center solidified, and the outer ring cracked as it expanded. Back to the drawing board.

My next plan was to heat the top of the freezing water with a flashlight.

I hoped this tiny white-hot bulb was enough to keep the top from freezing until the very end, leaving an exit route for the final, gas-rich liquid.

That didn't work. The ice didn't even seem to notice that the flashlight was pointing at it. It wasn't warm enough.

For anyone who didn't think a flashlight would work for 10 hours on one set of batteries, I confirm it will.

My next tactic was to get the flashlight bulb a little closer to the water.

I disassembled the flashlight and suspended it about a half-inch above the surface of the water.

In this photo, you can see how close the reflection was to the bulb.

The closer flashlight bulb didn't help.
In the morning there was a small reservoir of unfrozen ice around the bulb, but it wasn't large enough to prevent gas bubbles from being trapped in a donut-shaped ring around this warm center.

I had a thought that the container I was using was too optomistic. Maybe I should try making little clear ice cubes before I ventured into gigantic chunks.

My next attempt was to use a ziplock bag to flatten out my water test. I placed the flat bag onto a cookie sheet. I figured that would facilitate quick freezing on the bottom of the bag while leaving the top to freeze last.

Please Read Page 3 of Making Clear Ice >

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