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Students will investigate sodium content in the foods that they eat.
Halite, which is also called sodium chloride or salt, is a common mineral found in many products, including food. Salt can be used as a food seasoning and is valuable for preserving meats, especially in hot climates. In the U.S. only about 1% of processed salt is used in food, the rest is used as a deicer for the roads or in the chemical industry. In Roman times salt was used as currency and the English word salary actually comes from the Latin word Sal. You may have heard that a person is worth their salt or the salt of the earth meaning they are very valuable and highly praised. The recommended daily allowance of sodium is 2,400 mg.
4. Develop physical skills and personal hygiene.
5. Understand and use basic concepts and skills.
Invitation to Learn
Explain to students that you would like to invite two students to come to a “mineral munch.” The two students who can name the most items in the place setting that are made from rock materials (e.g., plates, silverware, vase, salt and pepper shakers, etc.) will be invited to dinner. Unveil the table for 5 seconds. Then give the class a minute to write down as many items as they can remember. Determine which two students had the most items made from rock material. Invite these students to come to the front of the class and become diners.