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science rocks minerals and fossils

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Josh Dawsey

on 26 April 2013

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Transcript of science rocks minerals and fossils

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli by audrey blackwell
joshua dawsey Rock vocabulary fossils and minerals Evolution Index fossils The fossil remains of an organism that lived in a particular geologic age. Used to identify or date the rock or rock layer in which it is found Amber Fossilized tree resin which has been appreciated for its color. Extrasion The admission of lava on to the surface of the thick Earth. Carbon Film Fossil Traces of plants or animals preserved as a been film of carbon. Rock cycle The rock cycle is an interconnected chain that keeps rock constantly on the move around the Earth.Like other cycles in nature it ensures a steady recycling of geological materials. This geological cycle also interplays with other cycles illustrating the interdependent of the various systems on Earth. Rock layers Age of Rocks Geologists usually know the age of rock by determining the age of the group of rocks, or formation, that it is found in. Also by the inclusion of index fossils in the rock. Geologists use fossils to divide to divide Earth history into named intervals. Law of superposition A bed or layer of sedimentary rock having approximately the same composition. What are fossils ? . Fossils are remains or impression of a prehistoric organism preserved in petrified form. Remains of ancient plants and animals. there are many types of fossils such as mold fossils, cast fossils, resin fossils, and body fossils. Classified by shape, color, size, texture,hardness,luster cleavage, and fracture The law of superposition is a key axiom based on observation of natural history that is a foundational principle. A general law stating that in any sequence. Mold Fossil . Mold fossil is when an animal is destroyed and mud hardens around it quickly. Fossilized footprint can help scientist tell how they stood or walked. Cast Fossil . The space left behind the beetle fills in with minerals which hardens over time in the beetles shape. It's flesh decays and bones grow worse due to chemical reactions. minerals gradually enters into the cavity resulting in a cast. Also known as Mold fossil which is in general form of the original organism. Body fossil a small mammal falls into a tar pit where it is entirely preserved. The actual remains of an organism including bones, shells and teeth. trace fossil A triceratops uses its horns to gauge a chunk out of a log. The log log gets fossilized with the gauges intact. Geological records of biological activities. Fossilex Trace Fossilex - Bite Marks
Resin Fossilex - A fly in Amber
Body Fossilex -skeleton
Rocks -dictated by the chemical and physical processes that formed them.
minerals - Inorganic solids with a unique chemical composition and crystaline structure that is found in nature. The basic building bllocks of the Earth. They're not living. Is the change in the inherited characteristics of biological populations over successive generations. The process of which species of organisms arise from earlier life form and under go change over time through natural selections.
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