A Mom and a Family of Men!

Monday, May 24, 2010

Eli's Icy Glue Experiment ~ Oceanography Unit

This experiment had to do with the freezing point of water with added salt. This one was very neat you must try it with your kiddos. You could make them think you were magic for just a moment. ;)

Eli set out to prove that salt water freezes at a lower temperature than fresh water. He gathered a glass full of cold water, ice cubes, the salt shaker, and atleast 6 inches of string.


He added an ice cube to the glass of cold water.


He then laid the string on top of the ice cube that was floating in the water.


Next he sprinkled some salt on the ice cube. He waited 20 seconds and VOILA the string and the ice were stuck fast together!!!


Remy had to do this one for himself!


I love how the younger ones in a homeschool can SO get in on what the older ones are doing. It is so neat!

When Eli put the salt on the cube of ice he lowered it's freezing point which by the way is 28.5 instead of 32 degrees with fresh water. This caused the ice to melt and the salt solution on top became more diluted with fresh water upping the freezing point a little and causing it to refreeze. This trapped the string or made the icy glue. ;)


Phyllis said...

I know what you mean. My second child taught himself to read just by listening to me teach my oldest. When I got to him, he already knew how to read and I didn't know it!

Mama Teaching 2 said...

Phyllis, that is so cute!!!! :)

Julia said...

Oh, this one is really neat! We are going to have to give this one a try!

Rhonda said...

Well that is just as neat as can be. We did this one when we first started homeschooling and my girls enjoyed it. I has completely forgotten about it.

Retro said...

I am loving all the experiments!

Heather the Mama Duk said...

I've always loved that experiment!