Rock Classification in 7th Grade Science

When studying rocks, scientists analyze their mineral composition, color, and texture. Rock-forming minerals play a significant role in Earth's geology, with granite and basalt being prime examples. The texture of rocks is determined by the size, shape, and pattern of grains present. Rocks form through various processes like cooling magma or lava (igneous rock), sedimentary rock formation from pressed particles and organic remains, and metamorphic rock creation under heat and pressure.

• Rock Classification
• Science
• Geology
• 7th Grade
• Texture

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1. CLASSIFYING ROCKS SECTION 4-1 7thgrade Science

2. CLASSIFYING ROCKS When studying rocks, scientists observe the rock s mineral composition, color, and texture

3. CLASSIFYING ROCKS Rock Forming Minerals Rock Forming Minerals 20 of the minerals that make up a majority of the earths rocks

4. CLASSIFYING ROCKS Granite Granite a light colored rock with a high silica content Basalt Basalt a dark colored rock with a low silica content

5. CLASSIFYING ROCKS-TEXTURE Grains particles in rocks that give rock its texture Grain size- fine or coarse Grain shape- round or jagged Grain pattern- Banded or nonbanded nonbanded Banded

6. CLASSIFYING ROCKS- HOW ROCKS FORM There are 3 major groups of rocks

7. CLASSIFYING ROCKS- HOW ROCKS FORM Igneous Rock Igneous Rock made from cooling Magma or Lava

8. CLASSIFYING ROCKS- HOW ROCKS FORM Sedimentary Rock Sedimentary Rock Forms when particals of other rocks and/or remains of plants and animals are pressed and cemented together Forms layers

9. CLASSIFYING ROCKS- HOW ROCKS FORM Metamorphic rock Metamorphic rock formed or changed by heat and pressure or chemical reactions. Most forms deep underground