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The rock cycle and its’ minerals
Lets Rock! The rock cycle and its’ minerals
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There are 3 different types of rocks;
Igneous Sedimentary Metamorphic
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Copy the Rock Cycle Diagram Below (words and arrows)
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Igneous Rock Igneous rocks are formed by magma and lava as it cools. They can either be very light and airy or the rocks can be glassy.
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Igneous rock
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Sedimentary Rock Sedimentary rock is made when sediments (sand, gravel, and dirt) are pressed together to make a rock Sedimentary rock is formed in layers.
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Sedimentary Rocks Limestone Shale Sandstone Granite
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Metamorphic Rock Metamorphic rocks are made from other rocks.
Heat and pressure help change an igneous or sedimentary rock into a new rock
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The Rock Cycle
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Parts Of Rocks
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Rocks have many different parts
Rocks can be sorted into groups by looking at the size of their grains and crystals.
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Crystals Crystals are different atoms that are formed in a pattern. They can be big or small, fat or thin.
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Grains Grains are smaller pieces of rock or sediment. Their size helps to determine the rock.
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Minerals
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Mineral Properties Used to identify minerals Color
Least useful property in identifying minerals. Why?
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Streak The color of a minerals powder. “streak test”
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Luster How the minerals surface reflects light.
Metallic vs. non- metallic.
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Hardness The ability of a mineral to resist being scratched.
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4. Hardness The harder substances scratch softer substances.
Rating 1-4 soft 5-6 medium hard Ex. A diamond (10) can scratch glass.
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Identifying Characteristics of Rocks
Igneous Intergrown crystals Glassy texture Lava or magma cools Sedimentary Cemented and compacted sediments-(sand, dirt) Can have Fossils Metamorphic Banding Foliated Come from other rocks
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