-Evidence of past life forms

Slides:



Advertisements
Similar presentations
Fossils Lesson 8.
Advertisements

The remains or evidence of a
Fossils A fossil is the preserved remains or traces of living things They must be natural and ancient (10,000 years or older) and buried in rocks.
The study of ancient life!
Hunting for Fossils How are fossil molds and casts made? An LSU Museum of Natural Science presentation to accompany the activity.
Fossils Essential Questions: What are fossils and how are they formed?
Fossils. livingFossils - the preserved remains or evidence of living things.
Evolution Evolution : The Science behind the theory Evolution Evolution : The Science behind the theory Geological time Fossils Darwin & Natural Selection.
FOSSILS. OVERVIEW Explain what fossils are and how most fossils form. Explain what fossils are and how most fossils form. Describe what fossils tell about.
Fossils.
10-1 Fossils What is a fossil? Fossils are the preserved remains or traces of living things How do fossils form? Fossils form when organisms die and are.
بسم الله الرحمن الرحيم Modes of preservation
A Trip through Geologic Time:
Define: Fossil Carbon film (carbonization) Petrified fossil (mineralization) Solid Cast Mold Trace Fossil.
A trip through geologic time: Fossils. Uniformitarianism The present is the key to the past. The same geologic processes that operate today operated in.
FOSSILS!!!! By: Patty Kittrell.
Objective 1/23/13 Identify various types of fossils. Intro
Original Preservation Natural mummification by drying.
Chapter 4 Views of Earth’s Past Pg Earth’s past is revealed in rocks and fossils.
FOSSILS 6 th Grade Science. OVERVIEW Explain what fossils are and how most fossils form. Explain what fossils are and how most fossils form. Describe.
Learning Targets 1.Identify a mold and cast fossil. 2.Identify a trace fossil. 3.Identify a petrified fossil. 4.Identify preserved remains. 5.Identify.
Fossils. Essential Question How can fossils be used to help explain what happened in the past?
Paleontologist: studies life that existed in pre-historic times.
FOSSILS. FORMATION OF FOSSILS Fossils are preserved remains or traces of living things. Fossils are preserved remains or traces of living things. Most.
Mr. Howard January  1.) Petrified or Permineralized  2.) Cast  3.) Mold  4.) Carbon Film  5.) Trace  6.) Original Remains.
Fossils.
Fossil Group # 1 Question: What is a Mold
Earth History What Fossils, Rocks, Rock Formations, and Life Tell us about the Age of the Earth?
Methods of Fossilization
The remains or impression of an organism that lived long ago.
FOSSILS Essential Questions: What are fossils and how are they formed?
The Fossil Record
Evolution: The Science behind the theory Geological time Fossils
Geology and Fossils.
A Trip Through Geologic Time
Fossils.
Fossils.
What is a fossil? What do fossils tell us?
Dinosaur Fossil Phenomenon
Fossils Conditions needed for fossil formation:
Fossils Fossils are remains or trace of an ancient organism.
Fossils Essential Questions:
Question How do you think fossils form?
Fossils!.
What is a fossil? What do fossils tell us?
Paleontology Presentation
Fossils.
Fossils and dating Practice Quiz.
Fossil Types and Conditions
Fossil Types…44.
Fossils.
Fossils.
Fossils Essential Questions: What are fossils and how are they formed?
FOSSILS.
Fossils Fossils are remains or trace of an ancient organism.
<< fossils >>
Fossils Essential Questions: What are fossils and how are they formed?
Fossils Essential Questions: What are fossils and how are they formed?
By Diana Johanson Book G Chapter 4 – Section 1
Paleontology Presentation
Fossils Essential Questions: What are fossils and how are they formed?
Fossils Essential Questions: What are fossils and how are they formed?
POD # 10 Paleontologists What is one thing that you have learned about a paleontologists? How do paleontologist classify organisms? How can fossils tell.
Fossils.
Fossils Essential Questions: What are fossils and how are they formed?
Fossils.
Question How do you think fossils form?
Fossil Notes.
Fossils Ch. 13 Section1.
Types of Fossils Fossils are evidence used to interpret and understand the history of the Earth and the things that have lived here. By T. Brown 2004.
Presentation transcript:

-Evidence of past life forms Fossils -Evidence of past life forms

What are Fossils and How Are They Made? Fossils are any evidence of earlier life. Mostly preserved in sedimentary rock Fossilization requires the rapid burial of the organism. Very small percentage of living organisms become fossils

Types of Fossilization unaltered preservation (like insects or plant parts trapped in amber, a hardened form of tree sap) permineralization=petrification (in which rock-like minerals seep in slowly and replace the original organic tissues with silica, calcite or pyrite, forming a rock-like fossil - can preserve hard and soft parts - most bone and wood fossils are permineralized) replacement (An organism's hard parts dissolve and are replaced by other minerals, like calcite, silica, pyrite, or iron) carbonization=coalification (in which only the carbon remains in the specimen - other elements, like hydrogen, oxygen, and nitrogen are removed) recrystalization (hard parts either revert to more stable minerals or small crystals turn into larger crystals) authigenic preservation (molds and casts of organisms that have been destroyed or dissolved).

Types of Fossils Original remains Petrified Fossils Carbon Film & Impressions Molds and Casts Trace fossils (foot prints)

Types of Fossils Original remains -preserved in amber, tar, or ice.

Types of Fossils Petrified Fossils – Organic materials are replaced with minerals.

Types of Fossils Carbon Film & Impressions – Chemicals such as liquids or gasses from organisms leave a “picture” or indentation.

Types of Fossils Molds and Casts - Organisms buried in sediment may decay or dissolve away leaving a cavity or mold.

Types of Fossils Trace fossils – preserved evidence of the activities of deceased organisms (footprints, burrows, nests, etc.)