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  1. 1. Kelly Rodríguez Listening and speaking V Universidad de Nariñ0 March 2014 San Juan de Pasto
  2. 2. Vocabulary Amber: yellow fossil resin.  Bury: to place something in the earth and cover with soil.  Burrow: an excavation in the ground made by an animal such as: a rabbit, a fox.  Compress: to reduce the size by pressing.  Date: to find out the time of an event.  Evolve: to develop gradually. Fake: not authentic.  Footprint: an impression made by a foot of a person or animal. Harden: to become harder.
  3. 3. Jawbone: the bone of the lower jaw.  Mold: a container that gives shape to a substance.  Rot: to decompose by the action of bacteria or fungi.  Seabed: the floor of the sea.  Seep: to filtrate through pores.  Skull: the skeletal part of the head which protects the brain.  Smear: to spread a substance over a surface.  Subsoil: the layer that is under the top soil.  Trap: to catch an animal in a trap.  Trace: an evidence.
  4. 4. Definition Fossils are traces of animals that live in the past.
  5. 5. Types of fossils 1. Body fossils: are the remains of the organisms. Examples:
  6. 6. BonesHairTeethShellsLeaves
  7. 7. Footprints Burrows 2. Trace fossils : signs of animals. Examples:
  8. 8. Fossilization processes 1. Natural mold. 2. Petrified wood. 3. Amber. 4. Carbonization. 5. Frozen fossil.
  9. 9. Steps of fossilization process 1. An animal dies. Ex: a fish. 2. The fish goes to the seabed. 3. Mud and other sediments bury the body in the deeper of the ocean. 4. Turns to fossil: takes million of years and the fossil will appear on the surface of soil.
  10. 10. Facts about fossils What are index fossils? They are used to identify geologic periods. What was Piltdown man? Piltdown man was a fake. The skull was human and the jawbone came from an orangutan.
  11. 11. Scientific importance 1. Identifying geologic periods. 2. Dating rocks. 3. It’s possible to know how the living beings have evolved. 4. Determining environmental conditions.