Curated OER
Determination of Water Hardness
Students investigate water hardness. In this water hardness lesson plan, students determine the water hardness in 4 samples of water after buffering each. By using titration and an indicator, students can determine the amount of calcium...
Curated OER
Why is the Ocean Salty?
In this ocean salt instructional activity, students read about the processes that have lead to the salt content in the ocean. Then students complete 5 short answer questions.
BioEd Online
Bio Ed Online: Neural Network Signals
Nervous system messages are sent as electrical signals along the length of axons and dissolved salts are important for electrical signaling in cells. In this lesson plan learners are introduced to this concept by creating an electrical...
US Geological Survey
U.s. Geological Survey: Saline Water
Information about saline water use in the United States.