How is seawater different from what comes out of your tap at home? The saltwater of the sea actually has different properties. Try this "Saltwater-Freshwater" experiment to learn what a pinch of salt can do!
What You'll Need:
- Sea water
- Bottled tap water
- Two mixing bowls
- Bar of pure soap
- Potato peeler
- Dish detergent
Next time you're at the seaside, try this experiment to compare salt water to fresh water:
Step 1: Pour two cups of sea water in one bowl and two cups of tap water in another bowl. Use a potato peeler to shave soap flakes from a bar of pure soap.
Step 2: Put a teaspoon of flakes in each bowl. Beat with an eggbeater. Which makes better soapsuds, fresh water or salt water?
Step 3: Clean the bowls and do the same experiment with dish detergent. Is there a difference between the kinds of suds produced?
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ABOUT THE ACTIVITY DESIGNERS:
The following activities were designed by Maria Birmingham, Karen E. Bledsoe, and Kelly Milner Halls.