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Transcript of FOSSILS!! \(^.^)/
Petrified Fossils-are fossils in which minerals replace all or part of an organism. Vocab. on fossils A scientist who studies prehistoric life. They study fossils to determine their evolution, interactions with one another, and their environments (to reconstruct their ecosystem of the past). Palaeontologist Various types of fossils Trace fossils - A fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.
Mold Fossil - A fossil formed when an animal, plant, or other organism dies and is covered by sediment, it`s flesh decays and bones deteriorate die to chemical reactions and a cavity remains below the ground surface.
Cast Fossil - A fossil that is a copy of an organism`s shape formed when minerals seep into a mold.
Petrified fossil - Are fossils in which minerals replace all or part of an organism.
Imprint Fossil - Really shallow external molds or voids left by animal or plant tissue. Amber Amber is fossilized tree resin (sticky flammable organic substance, can`t be dissolved in water) of Evergreen trees. First the insect is trapped in a sticky resin. When the insect dies, more resin covers it, sealing it from air and protecting it's body from decay. Q: How does the rock where the fossil is found provide clues to the age of the fossil?
A: It`s difficult to get an absolute age on sedimentary rocks. Often Palaeontologist just go by the rule that younger rocks are on top of older rocks. If they`re really lucky, there will be a volcanic ash layer in the rocks, or certain crystals or iron materials that we know how to date.
Q: How do scientists know where to dig for fossils?
A:Usually you see something on the surface, some scraps of bone sticking out from the rock. Bone has a different color. SO if you know what you're looking for, a bone catches your eye. By:Group 1 (Kelly R.,Krystal C.,Jenny Z., Jordan P.) Explore the amazing island of fossils Fossilization Process In order for the fossilization process to begin, the organism must first die. When the organism has died, a part of it is left here on Earth. That part becomes trapped in sediments, which eventually starts to compact, turning it into rock. Extinction The fossil record shows the millions of types of organisms have evolved. But many others have become extinct. A type of organism is extinct if it no longer exists and will never again live on earth.