Unit 6 Day 3 Notes

Unit 6 Day 3 Notes Fossils VA SOL  SOL 10 The student will investigate and understand that many aspects of the history and of the Earth and life can be inferred by and fossils. Key concepts include a. and  Virginia fossils are found mainly in the , of ancient, often extinct, life are by various , and means in many sedimentary rocks; and provinces d. rocks and fossils from many different geologic  Most Virginia fossils are of periods and epochs are found in Virginia . This indicates that large areas of the state have Objective been periodically covered with 1. Define what a fossil is, where they are found and how  Paleozoic, Mesozoic, and Cenozoic fossils are they can be ( , , found in Virginia and or shell.) Types of Fossils 2. Identify the in which fossils  There are numerous ways in which fossils can be are found . 3. Identify in where most fossils are found and what type of fossils are found 4. Identify that , , and fossils are found in Virginia. Fossils  Through fossil remains left behind by past organisms we can see evidence of ancient and and study the history of Earth Fossils  One of the most useful tools in discovering the past is preserved in many  The most common are , , and

 Original preservation are fossils that have any kind of change since the  Fossil is the , , organisms death or other evidence preserved in rock of the former existence  These types of fossils are uncommon because their of life preservation requires extraordinary circumstances such as  The fossil record provides evidence that , , or populations have undergone change through time in but they have been found response to becoming more complex over geologic time  is the change in populations as a result of

 1) Organism dies, 2) it is by sediment, 3) while buried the shell is by groundwater, 4) an is left behind  form inside of molds when  Woody parts of plants have been found in the permafrost in Alaska with minerals or sediment 10 Indirect Evidence  Often it is not the body parts of a past organism that  Soft parts of and Saber-toothed is found, but something left behind such as cats are preserved in the sticky ooze of the Le Brea Tar Pits , , or

 remains have been found in dry caves or buried in desert sands  that landed in ancient tree sap are found preserved in a  This evidence can provide information about how it lived, moved, or obtained food.  Dinosaur provide clues as to how fast they moved as well as the size and walking characteristics

 Altered Hard Parts are more common and occur when all the organic material has been removed and the  are the fossilized remains hard parts (shells, bones, etc) have of solid waste materials and provide valuable information of the eating habits of ancient animals

 is the process by Index Fossils which pore spaces are filled in with mineral substances  Certain fossils are ,  are formed when the original shell and parts of an organism within a sedimentary rock are . weathered and eroded and a is left in their place  They are essential to the process especially when they have lived for only a of time

VA SOL  SOL 10 The student will investigate and understand that many aspects of the history and evolution of the Earth and life can be inferred by studying rocks and fossils. Key concepts include a. traces and remains of ancient, often extinct, life are preserved by various means in many sedimentary rocks; and d. rocks and fossils from many different geologic periods and epochs are found in Virginia Homework  Complete Ch Study Guide 11