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Science - 5th Grade
Standard 2 Objective 3
1 class periods of 30 minutes each
Four forms of mountain formation are demonstrated and/or discussed.
For the Teacher:
Flat land becomes mountains and valleys when portions of the land are uplifted. Varying forces within the earth's crust can cause this uplift. Forces pushing toward each other can make the rock fold or fault (break and move). The Rocky Mountains are predominantly folded mountains, but in some areas there are faults.
Pushing can also cause rock within the crust to break and move forming fault block mountains such as those in Utah's Great Basin: the Wasatch, Oquirrh, and Stansbury Mountains.
Volcanic action can also form mountains. Molten rock (magma) that erupts at the earth's surface as flowing lava, cinders, or ash forms volcanic mountains. Such mountains in Utah include the Tushan Mountains and Black Rock Volcano.
Melted rock that pushes up the layered rock but does not erupt cools into igneous rock beneath the surface forming dome-shaped mountains. In Utah, dome-shaped mountains include the LaSal, Henry, and Abajo Mountains, and Navajo Mountain.
All mountains undergo the natural wearing down process of erosion. If mountain building forces are not active, mountains will again become flat land.
Instruct students to write a paragraph describing four ways that mountains are formed. Use the rubric below to evaluate their writing.