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Unit 2

Earth's Proces

TermDefinition
Where and how do Minerals Occur? on Earth
Rocks when 2 or more minerals mix together
Igneous Rocks When magma cools slowly under the Earth's surface or when lava cools quickly above the Earth's surface
Sedimentary Rocks form when sediments pile on top of each other and the weight of the and the top layer of sediments press the bottom layers tightly together
Metamorphic Rocks are changed by heat and pressure. These are the least common of the three rock types
Soil Parts Weathered rock, air, water, and humus
Fossils very old and take millions of years to form. They are remains of dead organisms
Kinds of Rocks Igneous Rocks Sedimentary Rocks Metamorphic Rocks
Fossil Fuels Oil, coal, and natural gas
Minerals are solid, pure and inorganic (not living)
Louisiana Minerals salt, sand, gravel, clay, and gypsum
Geologist study the minerals within a rock to determine what type of rock it is.
Magma Hot molten Rock
Lava Magma forced upward by heat and pressure in a volcano
Louisiana Rock mostly Sedimentary rocks
Humus decayed plants and animlas
Soil Layers Topsoil, subsoil, and bedrock
Topsoil layer where plants, worms, and bacteria live and grow
Subsoil middle layer contains mineral deposits from dripping water
Bedrock bottom layer that is formed of solid rock
Body Fossils remains of the body parts of an organism such as bones or shells
Trace Fossils the remains of things that were not living such as footprints and nest
Created by: sarmand7
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