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Understanding Earth's Rock Cycle: Processes, Properties, and Human Uses

Explore the fascinating rock cycle, which describes how new rocks form from old materials through continuous processes including weathering, erosion, deposition, and uplift. Learn how humans have utilized rocks throughout history for tools, weapons, and construction, and understand the types of rocks: igneous, sedimentary, and metamorphic. This chapter covers key vocabulary related to rocks and their characteristics, including composition and texture. Join us in discovering how these processes shape Earth's features and contribute to the dynamic landscape around us.

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Understanding Earth's Rock Cycle: Processes, Properties, and Human Uses

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Presentation Transcript

  1. Chapter 4-1 Rock Cycle

  2. Chapter 4-1 Main Ideas • Describe how rocks have been used by humans. • Describe the 4 processes that shape Earth’s features.

  3. Key Vocabulary • Rock – a naturally occurring solid mixture of one or more minerals/organic matter. • early uses for rocks included tools & weapons.

  4. Key Vocabulary • Rock Cycle – the continuous process by which new rock forms from old rock material. • Weathering – the process in which wind, water, ice, heat, & gravity break down rock

  5. Key Vocabulary • Erosion – the process by which sediment is removed from its source.

  6. Key Vocabulary • Deposition – the process by which sediment, moved by erosion is dropped and comes to rest. • Sediment – rock, mineral fragments.

  7. Key Vocabulary • Uplift – is movement within the Earth that causes rocks inside the Earth to be moved to the Earth’s surface. - When uplifted rock reaches Earth’s surface, erosion, weathering, & deposition begin.

  8. Key Vocabulary • Composition – the minerals that a rock contains; the chemical makeup of rock. • Texture – the size, shape, & positions of the grains that make up a rock.

  9. Types of Rocks • Igneous • Sedimentary • Metamorphic

  10. Igneous Rock • Formed when magma cools • Inside the Earth • Can be heated under pressure • Becomes metamorphic rock • Can be melted again to form new magma -- Becomes igneous rock • Above the ground • Can be weathered and eroded • Becomes sedimentary rock

  11. Sedimentary Rock • Formed when sediments compact & cement into layers • Inside the Earth • Can be heated under pressure to form metamorphic rock • Above the ground • Can be weathered again to form more new sediment • Inside the Earth • Can be melted again to form new magma igneous rock

  12. Metamorphic Rock • Formed when rock changes under heat & pressure • Inside the Earth • May melt to form magma igneous rock • Above the ground • May weather & erode to form sediment • Inside the Earth • Can be heated under pressure to form metamorphic rock

  13. http://www.cet.edu/ete/modules/msese/earthsysflr/rock.html

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