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Rocks

Rocks. What is a rock’s favorite cereal?. Coco pebbles!. What’s a rock’s favorite golf course?. Pebble Beach!. Look at the three different rocks at your table. Discuss with your table mates: What makes these 3 rocks different? What do they have in common?.

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Rocks

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  1. Rocks

  2. What is a rock’s favorite cereal? Coco pebbles! What’s a rock’s favorite golf course? Pebble Beach!

  3. Look at the three different rocks at your table. Discuss with your table mates: What makes these 3 rocks different? What do they have in common? Differences: color, size, shape, texture Similarity: all are made of smaller pieces (grains)

  4. Sedimentary Rocks Igneous Rocks Types of Rocks Metamorphic Rocks Squeezed & heated together Melted & cooled together Cemented together

  5. Sedimentary RocksHow are they are made? • Wind and water break down the earth • Bits of earth settle in lakes and rivers • Layers are formed and build up • Pressure and time turn the layers to rock

  6. Sedimentary Rock clastic non-clastic broken pieces of rock chemical (a precipitate comes out of water solution) organic (remains of plants & animals) eg. Stalactites/stalagmites

  7. Sedimentary Rocks Where do you think sedimentary rocks would be formed/found near? streams beaches rivers deserts oceans glaciers coral reefs

  8. Sandstone Limestone Gypsum Conglomerate Shale Types of Sedimentary Rocks

  9. Metamorphic RocksHow are they made? • Meta means “change” so these are rocks that have changed. • They were once igneous, sedimentary, or other metamorphic rocks. • Pressure and heat cause the change.

  10. Metamorphic Rock foliated nonfoliated “leafy” flattened & layered minerals no banding quartzite slate These rocks are physically deformed and chemically changed due to temperature and pressure changes but the rock does not melt!

  11. Where are metamorphic rocks likely formed/found near? In fault zones Mountain belts Mid-ocean ridges

  12. Schist Gneiss Types of Metamorphic Rocks

  13. Igneous RocksWhat are They? • Ignis is Latin for “fire”-igneous rocks are fire rocks • Formed underground by trapped, cooled magma • Formed above ground when volcanoes erupt and magma cools

  14. light colored eg. quartz dark colored eg. Iron & magnesium containing mafic felsic Igneous Rock intrusive (plutonic) extrusive (volcanic) Glassy/smooth & small crystals usually not even visible large crystals & coarse texture

  15. Where are igneous rocks likely formed/found near? Mid-ocean ridges Subduction zones volcanoes

  16. Scoria Granite Pumice Obsidian Types of Igneous Rocks

  17. Idioms and Expressions to Ponder Heart of stone Head full of rocks Stuck between a rock and a hard place unaffectionate, unforgiving, cold acted without thinking intelligently in a situation where you have to make a decision that has no good options or solution

  18. Every rock tells a story about: • how it formed • the environment where it has been • what it has experienced • Each of these stories is an adventure. We need to learn how to read a rock like we read a book.

  19. Roundness and Sorting Roundness – presence or absence of corners and sharp edges Particles get rounder as they are transported. Sorting - is a texture that indicates how long the sediments have been in the water system. Poorly sorted sediments show a wide range of grain sizes; well-sorted ones have similar sized grains. Sorting increases with transportation.

  20. High Energy low energy

  21. Rock Cycle Activity Check the drawer. See which table can put together the rock cycle diagram first!

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