Activity
NOAA

Please Pass the Salt

For Students 3rd - 5th
Salinity is the focus of two experimenters that work to answer the question, How does salt change the physical properties of water? Super scientists compare the freezing rate of salt and fresh water, combine the two waters to...
Activity
Science Buddies

Science Buddies: Can Water Float on Water?

For Students 6th - 8th
Of course it can, you say: ice is water and ice floats. And you're right. But we're talking about water in the liquid phase Can liquid water float on water? The goal of this project is to investigate what happens to layers of water with...
Activity
NOAA

Noaa: More Than Salt in Salt Water [Pdf]

For Students 9th - 10th
Realize that there is more in ocean water than just salt. Find out about the salinity of water and how changes in salinity may affect organisms living in the water.