Lesson: Salt and Desalination

What is SALINA TURDA (46.5877, 23.7877) in Romania?

Humans have a long and important relationship with salt. This lesson examines how and why salt are important and how humans are managing to remove salt from seawater.

Warm Ups, etc:

Of Human Necessity – interest grabber questions about salt

Instruction, Presentations, Assignments, Activities, etc:

Link to Study Guide Objectives & Vocabulary

Salt Reading - Small Group Presentation/Discussion- the geologic, historic and economic importance of salt, methods of desalination- students read sections from Wikipedia page, summarize, then answer key questions. Student groups then present their results.

SG Answers – instruct, review key points by answering the study guide objectives on salt and desalination

1. Salt is necessary for nerve, muscle and other functions. Iodine is added to salt to promote thyroid function and prevent goiter

2. High blood pressure (hypertension), heart problems, swelling/edema

3. Mining of rock salt (halite) or from evaporation (fleur de sal)

4. Remove salt from water to produce fresh water

Web Resources:

Shock Electrodialysis -MIT researchers divide a stream of water, pushing salts to one side

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