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Rock Utilization Throughout History: Tools, Structures, and Processes

Explore the ways humans have used rocks for tools, buildings, and roads. Learn about the processes that shape the Earth, including weathering, erosion, deposition, and uplift. Discover how rocks weather and deposit to form sedimentary rocks, transform under heat and pressure into metamorphic rocks, and melt into magma to create igneous rocks. Understand rock classification based on composition and texture, from fine-grained siltstone to coarse-grained conglomerate.

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Rock Utilization Throughout History: Tools, Structures, and Processes

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  1. The Rock Cycle Chapter 4 Section 1

  2. 2 Ways Rocks Have Been Used By Humans: • Tools like arrowheads, hammers, spear points, knives, and scrapers out of chert and obsidian rocks • To make buildings, monuments, and roads out of granite, limestone, marble, sanstone, and slate • Materials- concrete and plaster

  3. 4 Processes That Shape the Earth • Weathering- H2O, wind, ice, and heat break down rock into fragments- sediment • Erosion- H2O, wind, ice, and gravity erode and movesediments to collect somewhere else • Deposition- sediment is deposited or laid down in bodies of H2O and other low lying areas • Uplift- movement within the Earth that cause rocks inside the Earth to be moved up to the Earth’s surface

  4. Rock Cycle Weather & Deposit,-Sedimentary Rocks Heat & Pressure- Metamorphic Rocks Melting to magma, cooling of magma-Igneous Rock

  5. Rock Classification Composition Texture • Chemical makeup of rocks; describes either the minerals or the materials in the rock. • Quality of a rock based on the sizes, shapes, and position’s of the rock’s grains • How rocks look can reveal how they were made • Fine-grained- Siltstone • Medium-grained-Sandstone • Coarse-grained- Conglomerate

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