Add different salts to water, then watch them dissolve and achieve a dynamic equilibrium with solid precipitate. Compare the number of ions in solution for highly soluble NaCl to other slightly soluble salts. Relate the charges on ions...

Information about saline water use in the United States.

What happens when sugar and salt are added to water? Pour in sugar, shake in salt, and evaporate water to see the effects on concentration and conductivity. Zoom in to see how different sugar and salt compounds dissolve. Zoom in again to...

An experiment where students test how the boiling point of water is affected by adding salt. The experiment is well laid out with pictures that show how to perform the experiment.

Students use their own model of a salt crystal and water molecule to show how water dissolves salt. Then, they relate their observations to the structure of salt, water, and alcohol on the molecular level.

In this science fair project you'll discover how to turn the ocean into a source of freshwater by using the power of the Sun, and the water cycle. You will ultimately find just how salinity affects this process.

Students use a thermal process approach to design, build and test a small-scale desalination plant that is capable of significantly removing the salt content from a saltwater solution. Students use a saltwater circuit to test the...

Students use conductivity meters to measure various salt and water solutions, as indicated by the number of LEDs (light emitting diodes) that illuminate on the meter. Students create calibration curves using known amounts of table salt...

In this lesson, students will compare water from a fresh lake to water from the Great Salt Lake to begin to build a conceptual model for how salt dissolves in water. The lesson focuses on students using and developing models of molecules...

In this learning activity, students explore tides and salinity from tidal freshwater to high salinity conditions along the York River estuary. They learn how salinity changes with an incoming and outgoing tide, observing the dynamics of...

In this experiment, students are asked to collect data in order to prepare a calibration curve showing the relationship between the percentage of salt and the mass of salt water. Using this graph, students will be able to determine the...

[Free Registration/Login Required] While paying attention to the charges, move the salt ions and water molecules around to simulate how salt ions are dissolved in water.

The USGS reviews the differences between lakes and reservoirs. They discuss the history of freshwater and salt water lakes. Click Home to access the site in Spanish.

Discover 10 very interesting things about water, including sources of life, ocean ecosystems, freshwater and ice, salt and salt water, sources of water, the body's water makeup, plant's consumption of water and the 3 states of water.

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...

Students are challenged to search for and find plants and animals that live in a mangrove forest.

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.

In this activity, students will see that a carrot slice sinks in fresh water and floats in saltwater. Considering the placement of the carrot slice in water and salt water, students will infer that the density of salt water must be...

Demonstrate surface tension by sprinkling pepper on a bowl full of water, then touching a soapy finger to the water.

Students explore materials engineering by modifying the material properties of water. Specifically, they use salt to lower the freezing point of water and test it by making ice cream. Using either a simple thermometer or a mechatronic...

Make learning about Earth's biomes fun and easy with video clips, photographs, and diagrams. Learn about estuaries, the water environments formed where freshwater from rivers or streams mix salt ocean water. [6:38]

In this activity, students learn about ocean currents and the difference between salt and fresh water. They use colored ice cubes to see how cold and warm water mix and how this mixing causes currents. Also, students learn how surface...

What do you know about salt? In this chemistry instructional activity, students will learn different things about salt: the chemical name, it's periodic table number, it's shape under the microscope, how it dissolves in water, and how to...

In this chemistry lab, students investigate whether water molecules have any space between them by filling a glass with water, and adding salt without the water overflowing. They will also experiment with the temperature of the water.