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January 17, 2013 Q-2 Pg.

January 17, 2013 Q-2 Pg. Science Starter : Explain why iron can be found in rocks. How are mechanical and chemical weathering similar to physical and chemical changes? How are they different? Why does metamorphic rock often have bands of different colors in the rock?.

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January 17, 2013 Q-2 Pg.

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  1. January 17, 2013 Q-2 Pg. Science Starter: Explain why iron can be found in rocks. How are mechanical and chemical weathering similar to physical and chemical changes? How are they different? Why does metamorphic rock often have bands of different colors in the rock? Daily Goal:We will be able to classify 3 different types of rocks. Homework:Turn in missing work! Finish weathering packet

  2. Classification of Rocks

  3. Sedimentary Sedimentary Rock: rock formed from layering of sediment (broken pieces of rock) SANDSTONE

  4. Sedimentary CONGLOMERATE Sedimentary rock is made of large pieces of sediment such as pebbles and stone.

  5. SEDIMENTARY • Clastic (chunks of other rocks) • Bioclastic (shells, organic remains) • Crystalline (crystals of salt) • Similar-colored layers

  6. Clastic- Rocks composed of fragments of pre-existing rocks; fragmental Bioclastic - Rocks derived from shell fragments or other organic remains Crystalline - Rocks composed of crystals

  7. Metamorphic Metamorphic Rock: rock formed from heat and pressure

  8. Metamorphic • Metamorphic rocks are rocks that have morphed into another kind of rock. SCHIST In some metamorphic rocks, you can see where the mineral grains are flattened from the heat and pressure! GNEISS

  9. METAMORPHIC • Foliation (layers) • Microscopic mica crystals • Stretched/distorted pebbles or fossils

  10. Igneous • Igneous Rock: rock formed from the cooling of magma. • The cooling magma gets caught in pockets and cools to form igneous rock

  11. Igneous You can see here pockets of air formed during cooling. SCORIA Obsidian rocks are formed when lava cools quickly above ground OBSIDIAN

  12. IGNEOUS • Vesicular • Coarse-grained • Glassy

  13. Vesicular - Rock that has gas pocketsCoarse - Rock that has a chunky, large particlesGlassy - Rock that has a smooth, glass-like texture

  14. Discussion Question 1. Why is it unlikely that fossils would be found in igneous rocks?

  15. Discussion Question 2. If a metamorphic rock contained fossils, how might they look?

  16. Discussion Question 3. Why might igneous rocks be porous (or have little holes)?

  17. Discussion Question 4. What is the difference between erosionand weathering?

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