UEN Security Office
Technical Services Support Center (TSSC)
Eccles Broadcast Center
101 Wasatch Drive
Salt Lake City, UT 84112
(801) 585-6105 (fax)
Science - 5th Grade
Standard 2 Objective 1
1 class periods of 30 minutes each
Rock salt is used to model the impacts of water and mechanical action on the erosion of rocks.
For the Teacher:
In this activity, rock salt is used to represent rocks in the erosion process. It is important for students to understand that even though rock salt isn't a rock, it will show affects similar to rocks due to friction and/or water exposure. Some rocks are very dramatically affected by water and the minerals in it. Other rocks are affected more by the abrasion of materials carried in the water as it moves over the rocks.
Prior to the start of the lab:
Ask students to write a paragraph that explains how their rock salt investigation is like erosion. Evaluate their paragraphs using the Science Writing Rubric.
Assign students to bring in a rock that has been eroded by water and one that shows signs of erosion by abrasion.