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Name: __________________________ Science Unit 2: Vocabulary List One Quiz Date: ___________________________________________________________ Paleontologist Organism a scientist who studies the forms of life that existed in former geologic periods, mainly by studying fossils. An individual animal or plant Remains The parts left over after other parts have been removed, used, or destroyed Preserve To maintain something in its original or existing state Sediment Deposited rock particles and other materials that settle in a liquid Fossil Any evidence of an organism that lived in the past Fossilization A rare event when remains or evidence of organisms are hardened and persevered A trail, nest, burrow, or other evidence of an organism found fossilized in sediments; it shows the activity of an organism, but is not made of the organism itself A type of fossil clearly showing the outside features of an organism. Casts are formed when these are filled in with hardened sediments. A type of fossil formed by hardened sediments within a mold. Trace fossil Mold Cast Name: __________________________ Science Unit 2: Vocabulary List Two Quiz Date: ___________________________________________________________ Sedimentary Rock Imprint Rocks that formed when layers of sediment such as clay, mud, silt, or sand hardened over millions of years. These types of sediments are laid down in lakes, swamps and oceans. A fossil created by a print or impression Amber Hardened tree sap, yellow to brown in color, often a source of insect fossils Petrified A description of plants or animals that have been preserved by being “turned to stone” Extinct Extinction No longer in existence the death of every member of a species Name: __________________________ Science Unit 2: Vocabulary List Three Quiz Date: ___________________________________________________________ Subtle Not immediately obvious; difficult to detect Drastic Extreme or forceful; severe Erosion the process by which soil and rock are removed from the Earth's surface by natural processes such as wind or water flow, and then transported and deposited in other locations The process of breaking down rocks into smaller pieces that create sediment Weathering Deposition The buildup of matter by a natural process, for example the laying down of sediments in a river Landslide The rapid downward sliding of earth and rock often caused by events such as over-steepening of slopes by erosion, heavy snowmelt, and earthquakes The sudden ejection of hot ash, molten rock, and various gases from an opening on the crust of a planet Volcanic eruption Earthquake Movement or vibration in the rocks that make up Earth’s crust Delta A triangular section of sediment deposited at the mouth of a river (where it flows into another body of water)