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Slowing the melting rate of ice with reflective containersFeatured science projectScience project video

Observation

It is observed that the ice in the conical flask covered with the aluminum foil stayed frozen the longest. The ice in this flask stayed frozen (at least some of it), for a significantly longer period of time than the other flasks.

Thermal insulation Time taken or the ice to melt
  Start 0.5 hour 1.0 hour 1.5 hours 2.0 hours 2.5 hours
None Y Y X X X X
Kitchen towels Y Y Y X X X
Aluminum foil Y Y Y Y Y X

Y - ice not melted, X – ice has melted

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Complexity level:
4
Project cost ($):
10
Time required:
1 hour to prepare, 5 hours for observation
Material availability:
Easily found
Safety concerns:

Basic safety requirements