Chapter 13outlinept2


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Chapter 13outlinept2

  1. 1. First Life <ul><li>The first life forms on Earth did not need oxygen. </li></ul><ul><li>Who or what were these organisms? </li></ul><ul><li>How about _________ !!!!!!!!!!!!!!!! </li></ul><ul><li>_________ are not complete organisms. They need other organisms to provide nutrients to live </li></ul><ul><li>SO!!!!!!!!!!!!!!!!! </li></ul>
  2. 2. 2.5 b.y.a. <ul><li>Oxygen build up primarily due to organisms that perform photosynthesis. </li></ul><ul><li>These photosynthetic organisms are called _________ . </li></ul><ul><li>Today cyanobacteria live in all green plants and are called? </li></ul><ul><li> _________ </li></ul>
  3. 3. <ul><li>Most of the first oxygen reacted with iron forming _________ (rust). </li></ul><ul><li>Once the available iron finished reacting, oxygen began to accumulate in the atmosphere. </li></ul>
  4. 4. <ul><li>_________ began to accumulate in the atmosphere about 2.5 billion years ago. </li></ul><ul><li>Ocean dwelling organism appeared in the fossil record about 540 million years ago (m.y.a.). </li></ul>
  5. 5. Precambrian Fossils <ul><li>_________ – are layered mounts of calcium carbonate, which are the remains of material deposited by algae. </li></ul>
  6. 6. Paleozoic Era: Life Explodes <ul><li>The Paleozoic ear is made of several periods including: </li></ul><ul><li>Permian – youngest period </li></ul><ul><li>Pennsylvanian </li></ul><ul><li>Mississippian </li></ul><ul><li>Devonian </li></ul><ul><li>Silurian </li></ul><ul><li>Ordovician </li></ul><ul><li>Cambrian – oldest period </li></ul>
  7. 7. Early Paleozoic History <ul><li>During the Cambrian, Ordovician, and Silurian periods, the vast southern continent of _________ included: </li></ul><ul><li>South America </li></ul><ul><li>Africa </li></ul><ul><li>Australia </li></ul><ul><li>Antarctica </li></ul><ul><li>India </li></ul><ul><li>And perhaps China </li></ul>
  8. 8. North America <ul><li>was most likely on or near the equator. </li></ul><ul><li>had no living things, plant or animal. </li></ul><ul><li>Later on North America collides with Africa beginning the formation of the Appalachian Mountains and continues for 200 million years. </li></ul>
  9. 9. <ul><li>By the Silurian period, shallow seas or epicontinental seas covered much of North America. </li></ul><ul><li>Many barrier reefs prevented circulation between the shallow marine basins and the open ocean. </li></ul><ul><li>As the water evaporated salt and gypsum deposits formed. </li></ul>
  10. 10. _________ 2.7 b.y.a <ul><li>We now have the basic part to make all forms of life </li></ul><ul><li>We just need to make things more and more complex </li></ul><ul><li>_________ must adjust to do different kinds of jobs </li></ul>
  11. 11. What is the name of the 1 celled life form in the oceans? <ul><li>_________ </li></ul><ul><li>represents all animal life to come </li></ul><ul><li>_________ </li></ul><ul><li>represents all plant life to come </li></ul>Plankton – 1.8 b.y.a.
  12. 12. Colonial organisms <ul><li>_________ critters that are not very specialized </li></ul><ul><li>_________ </li></ul><ul><li>_________ - (polyps) </li></ul><ul><li>_________ </li></ul>
  13. 13. Early Paleozoic Life <ul><li>Life at this time is restricted to the oceans. All forms of life were invertebrates. </li></ul><ul><li>1- _________ – bottom dwelling scavengers. They occurred in more than 600 types. They were the _________ form of life at this time. </li></ul>
  14. 14. Paleozoic Era - Cambrian period <ul><li>Dominant form of life is the trilobite </li></ul><ul><li>Body segments </li></ul><ul><li>Head shield </li></ul><ul><li>Tail shield </li></ul>
  15. 15. <ul><li>2 – _________ – these shelled organisms replace trilobites as the dominant form of life. Except for one species, brachiopods are extinct today. </li></ul><ul><li>Their larvae were free swimming, but like oysters and clams, these shelled animals were attached to the ocean floor. </li></ul>
  16. 16. Paleozoic Era - Cambrian period <ul><li>brachiopods are present [ forerunner to the _________ ] </li></ul>
  17. 17. <ul><li>3 – _________ – cousin to the octopus and squid. These highly mobile _________ were the major predator of the time. </li></ul><ul><li>Cephalopods were the first large animal on Earth. </li></ul><ul><li>By the end of the Ordovician many organism were able to secret material to form hard parts such as an exoskeleton. </li></ul>
  18. 18. Paleozoic Era –Ordovician 505 – 440 m.y.a. <ul><li>cephalopods ( _________ ) </li></ul><ul><li>oldest one is the _________ </li></ul>
  19. 19. Late Paleozoic <ul><li>The tectonic reorganization of Earth’s landmasses into one supercontinent called _________ . </li></ul>
  20. 20. Late Paleozoic History <ul><li>North America collides with Africa closing the narrow sea that separated them. </li></ul><ul><li>As this collision continues the rest of the Northern Hemisphere continents join them. </li></ul><ul><li>This resulted in the formation of the northern continent of _________ . </li></ul><ul><li>By the Permian, Gondwana has traveled north and collides with Laurasia. </li></ul><ul><li>By the end of the Paleozoic _________ is formed. </li></ul>
  21. 21. Late Paleozoic Life <ul><li>Plants living at the water’s edge move onto the land. </li></ul><ul><li>These plants were leafless vertical spikes about the size of your index finger. </li></ul><ul><li>By the end of the Devonian Period (40 million years later) there were forests. </li></ul><ul><li>The first forests were in _________ ….. </li></ul>
  22. 22. _________ First primitive fish _________
  23. 23. Paleozoic Era – Silurian 440 – 410 m.y.a. <ul><li>Appearance of _________ water fish. </li></ul><ul><li>1st land critters appear and were????? </li></ul><ul><li> _________ </li></ul><ul><li>Including: _________ </li></ul><ul><li>_________ </li></ul><ul><li>_________ </li></ul><ul><li>_________ </li></ul><ul><li>_________ </li></ul>
  24. 24. Paleozoic Era - Devonian Known as the AGE OF FISHES <ul><li>_________ </li></ul><ul><li>_________ </li></ul><ul><li>_________ </li></ul><ul><li>_________ </li></ul><ul><li>_________ </li></ul><ul><li>all modern fish </li></ul>
  25. 25. <ul><li>Amphibians diversified on land because they had no major competitors. </li></ul><ul><li>By the Pennsylvanian period large tropical swamps extended across North America, Europe, and Siberia. </li></ul><ul><li>Coal deposits today resulted from these swamps. </li></ul>
  26. 26. Lobe fin became the ancestor of _________