A likes science. He likes the big long projects that we do over hours or days or weeks...but he also LOVES the quick and easy experiments. Yesterday he said he was in the mood for some experimentin'. So, we pulled out a few supplies that are always at hand and off we went!
Supplies:: ice cubes & water in a glass, salt (kosher or iodized is fine), thread
Start off with several ice cubes in a glass of cold water. Fill up enough so the ice is easy for small hands to reach. (You can do it with just ice in a bowl - my boys saw it this way on a science show, so wanted the full glass with cubes and water).
Cut a foot or so of thread from your spool and lay the string over the ice cube.
Sprinkle some salt right onto the thread and ice cube.
Wait a minute (be patient!). Lift the string!
Of course with my boys the next step is empty out the glass and REPEAT (several times)!
What's happening with the thread then? "In the places where the salt is, the icecube is forcibly melted and also those places get very very cold. In the other places where salt didn't land, you now have melted water sitting on a much colder icecube. This causes those parts to quickly refreeze. This sticks the thread to the icecube, and you can pick it up!"To find out more of the why's and how's of this super easy experiment, go here>>
I finally got back to my sewing machine (gosh, it has been a long time) and made a few things - so I think I'll be having a blog giveaway...more on that soon!