1
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 to the number of ions in the formula of a salt. Calculate Ksp...
Grade Level   9 10 11 12
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2
Published in 2007
This article describes the  salinity in the Great Salt Lake, Utah. This USGS publication gives information about the lake's history, ecology, and other geosciences (hydrology, geology, geography).
Grade Level   4 5 6 7 8 9 10 11 12
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3
Just as air can have different densities, water can have different densities as well. As the salinity of water increases, the density increases as well. Fresh eggs will float in saltwater, but will sink in freshwater. This will show that as the salinity increases the density also increases.
Grade Level   4 5 6 7 8 9 10 11 12
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4
"Lakes and seas in inland desert areas like the Dead Sea and the Great Salt Lake are famous for being so salty that hardly anything can live in the water. You can tell they are salty because it is very easy to float in them , and very difficult to swim. But just how salty are they? With this...
Grade Level   9 10 11 12
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5
Density is a measure of the mass per unit volume of a substance. The density of seawater depends on many factors such as the concentration of salt dissolved in it and its temperature. This demonstration shows different gradients of density in ocean water.
Grade Level   6 7 8 9
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6
In this activity, students make an evaporate, a deposit of salt that forms when salty water evaporites. Evaporites are found on land, such as the Bonneville Salt Flats in Utah, and at some locations in the ocean, such as the eastern Mediterranean Sea.
Grade Level   1 2 3
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7
By TED-Ed
Published in 2013
The world needs clean water, and more and more, we're pulling it from the oceans, desalinating it, and drinking it. But what to do with the salty brine left behind? In this intriguing short talk, TED Fellow Damian Palin proposes an idea: Mine it for other minerals we need, with the help of some...
Grade Level   6 7 8 9 10 11 12
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8
We all know the oceans are salty but so are other sources of water. The oceans have a salinity (salt content) of 35%. The Dead Sea has an average salinity of 290%, almost nine times saltier than the oceans. But what actually does that mean? Just how salty tasting are these various bodies of water?...
Grade Level   6 7 8 9 10 11 12
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9
Published in 2015
Loads of salt aren’t just bad for humans, but plants as wall. Plants absorb the salt through their roots, potentially cutting off their water supply, causing for dead plants. Watch this video to learn what farmers are doing to reduce the high levels of salt in the soil.
Grade Level   3 4 5 6 7 8 9 10 11 12
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10
"Water freezes at 32 degrees Fahrenheit (0 degrees Celsius). Adding salt to water lowers the freezing point. How low the freezing point goes depends upon the amount of salt in the water. The students will make homemade ice cream but the """"freezing times"""" will vary using different amounts of...
Grade Level   4 5 6 7 8 9 10 11 12
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11
What is sea ice? It is simply frozen ocean water. Why is sea ice important? While it occurs mainly in polar regions, sea ice influences our global climate. Changing amounts of sea ice can affect ocean circulations, weather patterns, and temperatures around the world. Sea ice insulates the relatively...
Grade Level   6 7 8 9 10
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12
Ocean currents — the continuous, directed movement of ocean water — affect regional climates and alter the biological and chemical characteristics of seawater. Currents can flow for long distances both at and below the ocean’s surface. Wind drives surface currents, whereas density often drives...
Grade Level   6 7 8
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13
Published in 2016
"New techniques may help create rain. """"Cloud-seeding"""" involves flying into clouds and spraying salt. This article and video explain how cloud-seeding takes place."
Grade Level   5 6 7 8 9 10 11 12
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14
National Marine Educators Association (NMEA) is a dedicated, influential member-based organization of classroom teachers, informal educators, university professors, scientists, and more from around the world working together to advance the understanding and protection of our freshwater and marine...
Environmental Education Organizations Organizations
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15
"Each group will design a water filtration system and present to the class why they picked their design. Students are given a variety of materials (soil, gravel, charcoal, etc) and must try to filter """"polluted"""" (with food coloring, salt, dish soap) water."
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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16
The students will set up three demonstrations to observe the properties of water. They will explore the boiling point of water, the freezing point of water, and the ability of water to store heat. These activities can be done individually or as a set. About 71% of the Earth's surface is covered with...
Grade Level   6 7 8 9 10 11 12
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17
Data and maps, research, reports, fact sheets; Location: Salt Lake City, UT
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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18
Published in 2015
Somewhere inside of every raindrop is a tiny impurity. A touch of salt, a speck of soot and grain of clay is absolutely crucial to a rain drops existence. In fact, without these microscopic pieces of dirt, there would be no rain because water vapor cannot condense into droplets on its own. This...
Grade Level   4 5 6 7 8 9 10 11 12
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19
Published in 2015
Do you want to try cleaning up an oil spill yourself? This experiment will help you understand why it is such a difficult task. All of the tools you will need are environmentally friendly and easy to find. By the end of this lesson, students should be able to: determine which sorbents best absorb...
Grade Level   6 7 8
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20
Published in 2017
What gives Velcro its stick? Why does pollen make some people sneeze? And, how pure is the salt that we put on our food? In this episode of STEM Flicks, explore the role that microscopy plays in our everyday lives. Discover how scientists and engineers at Pacific Northwest National Laboratory use...
Grade Level   K 1 2 3 4 5 6 7 8 9 10 11 12
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