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Rock Test Review. What is a mineral and how do we identify them?. A mineral is a naturally formed, inorganic solid that has a definite crystal structure and chemical composition.
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What is a mineral and how do we identify them? • A mineral is a naturally formed, inorganic solid that has a definite crystal structure and chemical composition. • Minerals are identified using their properties – hardness, luster, color, specific gravity, streak, crystal structure, and cleavage/fracture
What is reclamation? List 3 ways to reduce the impact of mining. • Reclamation is reclaiming or restoring the land to the way is was or better than it was before it was mined. • Reclaim, reuse/reduce, and recycle
What is stratification and what types of rocks does it form? • Stratification is layered deposition of sediments in a body of water • It forms sedimentary rocks
Describe how igneous, sedimentary, and metamorphic rocks form and give examples of each. • Igneous rock – form from molten rock that has cooled and hardened. Examples – granite, basalt, and obsidan • Sedimentary rock – forms from weathering, erosion, deposition, compaction, and cementation of sediments. Examples – sandstone, conglomerate, and coal • Metamorphic rock – forms from heat, pressure and chemical reactions. Examples – marble, slate, and Quartzite
What is a rock • Naturally occurring solid formed from one or minerals
How are sediments formed? • Weathering and breaking down of rock into small fragments or pieces
What process do rocks undergo to become metamorphic rocks? • They undergo heat and pressure
How do geologists classify metamorphic rocks? • They are classified as foliated (banded or layered) or nonfoliated (not banded or layered)
Explain the Rock Cycle. • It is a continues process in which rocks are changing from one type of rock to another
What is deposition? • The laying down of sediments
List the three types of sedimentary rocks and give examples of each. • Clastic – sandstone and conglomerate • Organic – coal, and chalk • Chemical - Halite
Describe three ways humans can use rock and minerals • Many different answers
What is the difference between intrusive and extrusive igneous rocks? • Intrusive – cools slowly deep inside the earth (magma) –large crystals • Extrusive – cools quickly at or near the surface of the earth (lava) – small crystals
What is the difference between weathering and erosion? • Weathering – breaking down of rock into sediments • Erosion – movement of sediments from one location to another
What type of rock formation is Stone Mountain? • Intrusive igneous rock
What is the difference between foliated and nonfoliated? • Foliated – banded or layered • Nonfoliated – not banded or layered
Where are metamorphic rocks formed? • They are formed deep within the earth’s crust.
What are the steps of the scientific method? • State the problem • Research background information • Form a hypothesis • Create an experiment • Perform the experiment/Collect data • Analyze the data • Communicate the results
ROCKS Igneous Metamorphic Sedimentary Organic Chemical Foliated Intrusive Extrusive Clastic Nonfoliated