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Rock cycle PowerPoint

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Descriptive of how rock cycle is formed

Descriptive of how rock cycle is formed

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  • 1. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu BY: EMMA, ELISHA, AND DILLON Rock Cycle
  • 2. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu The Rock Cycle • A rock is a naturally occurring solid mixture of one or more minerals or organic matter. • New rock forms from old rock material constantly. • The series of processes in which a rock forms, changes from one type to another, is destroyed, and forms again by geological processes is called the rock cycle. The Rock Cycle Chapter 10
  • 3. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu The Rock Cycle Pictures
  • 4. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Pictures
  • 5. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu The Value of Rock • Rock has been an important natural resource for as long as humans have existed. • Ancient and modern civilizations have used granite, limestone, marble sandstone, slate and other rocks as construction materials. • Rock is also an important ingredient in concrete and plaster, both of which are commonly used in construction. The Rock Cycle Chapter 10
  • 6. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Resources Processes That Shape the Earth • Certain geological processes make and destroy rock. • These processes shape the features of our planet. • These processes also influence the type of rock that is found in certain areas. The Rock Cycle Chapter 10
  • 7. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Processes That Shape the Earth, continued • Weathering, Erosion, and Deposition The process in which water, wind, ice, and heat break down rock is called weathering. • Weathering is important because it breaks down rock into fragments of which sedimentary rock is made. The Rock Cycle Chapter 10
  • 8. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Processes That Shape the Earth, continued • The process by which wind, water, ice, or gravity transports soil and sediment from one location to another is called erosion. • The process in which sediment moved by erosion is dropped and comes to rest is called deposition. The Rock Cycle Chapter 10
  • 9. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Processes That Shape the Earth, continued • Heat and Pressure Sedimentary rock can also form when buried sediment is squeezed by the weight of overlaying layers of sediment. • If the temperature and pressure are high enough, the rock can change into metamorphic rock. • If the rock gets hot enough to melt, this creates the magma that eventually cools to form igneous rock. The Rock Cycle Chapter 10
  • 10. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Processes That Shape the Earth, continued • How the Cycle Continues Buried rock is exposed at the Earth’s surface by a combination of uplift and erosion. • Uplift is the movement within the Earth that causes rocks inside the Earth to be moved to the surface. • When uplifted rock reaches the Earth’s surface, weathering, erosion, and deposition begin. The Rock Cycle Chapter 10
  • 11. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Illustrating the Rock Cycle • The rock cycle is the continual process by which new rock forms from old rock material. Round and Round It Goes • Rocks may follow various pathways in the rock cycle. The following Visual Concepts presentation show the different ways rock may change when it goes through the rock cycle. The Rock Cycle Chapter 10
  • 12. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Rock Classification, continued • Each class of rock can be divided further, based on differences in the ways rocks form. • Igneous rock can be divided again based on whether the magma from which it forms cools on the Earth’s surface or below ground. The Rock Cycle Chapter 10
  • 13. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Rock Classification, continued • Sedimentary and metamorphic rocks are also divided into smaller groups. • Scientists study rocks in detail using two important criteria: composition and texture. The Rock Cycle Chapter 10
  • 14. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Rock Classification, continued • Composition is the chemical makeup of a rock. Composition can describe either the minerals or other materials in the rock. • Texture is the quality of a rock that is based on the sizes, shapes, and positions of the rock’s grains. The Rock Cycle Chapter 10
  • 15. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Videos
  • 16. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu
  • 17. Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu THANKS FOR WATCHING