When salt is mixed with ice it lowers the freezing point. Usually water freezes at 32° F (0° C), but when it is mixed with salt it lowers the freezing point significantly. This simply means the ice melts.
For our experiment today we will use this phenomenon to do a little trick I like to call "Fishing for Ice".
Difficulty: This may be the easiest experiment we have done so far, which is saying a lot since most of our experiments are very easy.
Materials You Need:
Cup full of water
A few ice cubes
A piece of string
- Place the ice cubes in the cup of water. They will float on top.
- Try to "fish" for an ice cube with the string. It won't "catch" anything.
- Place the string in the water and across the top of the ice cubes.
- Now sprinkle a little bit of salt across the ice cubes. Wait for a minute or so.
- Pull the string out and see what you caught!
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