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Page 2
 
Experiment to find out what materials are the best insulators by wrapping ice
cubes in different insulators. Try to use the same amount of each material and
the same size of the ice cubes. Keep a record of the ice cube melting
times on the chart below.  Can you find an insulator that keeps an ice cube
longer than sand? You can use the best insulator for your ice cube keeper.
 
Insulator           |            Ice Cube melting time
____________________|___________________________________
newspaper           |
____________________|___________________________________
rags                |
____________________|___________________________________
sand                |
____________________|___________________________________
try some of your own|
ideas               |
____________________|____________________________________
                    |
____________________|____________________________________
                    |
____________________|____________________________________
 
 
 
HOW AN INSULATOR WORKS:
 
An ice cube melts as it is warmed by air or anything else
touching it. Insulating materials have tiny pockets of air
within them that separate the ice cube from the warm room
air.  these tiny pockets, or dead air space, slow down the movement of heat
from the room air to the ice cube.
 
3. Do you think that the insulation in your ice cube keeper should be packed
tightly or left loose?___________________
 
___________________________________________________________
 
___________________________________________________________
Why?
 
___________________________________________________________
 
4. Place one ice cube in a dish. Place a similar ice cube on
a sponge in a dish. Which do you think will take longer to
melt?______________________________Why?____________________
 


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