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Today

Today. Hand in any work needed. Get out a small piece of paper, PUT YOUR NAME ON IT. When bell rings the quiz will start and you will have 1 minute per question to answer. Question 1. List the order the rocks came in First Second Third Forth Fifth Sixth. Question 2.

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Today

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  1. Today • Hand in any work needed. • Get out a small piece of paper, PUT YOUR NAME ON IT. • When bell rings the quiz will start and you will have 1 minute per question to answer.

  2. Question 1 • List the order the rocks came in First Second Third Forth Fifth Sixth

  3. Question 2 • What is the oldest group here?

  4. Question 3 • What geologic period did the placoderm fish mostly live?

  5. Question 4 • What minerals are in andesite?

  6. Answers • 1.) List the order the rocks came in • 4, 5, 2, 6, 1, 3 • 2.) What is the oldest group here? • Borden group • 3.) What geologic period did the placoderm fish mostly live? • Devonian • 4.) What minerals are in andesite? • Feldspar, Biotite, Amphibole

  7. Mass Extinctions

  8. Vocab • Time scale • Mass extinction • Evolution

  9. Geologic Time Scale • Earth was formed 4.6 BYA (billion Years Ago) • How do we know this? • How old is the oldest rock on Earth? • (look at your ESRT!)

  10. Geologic timeline • Copy this down!

  11. Mass Extinctions • These are events where most or a lot of living things on Earth were killed. • To go Extinct means to have a whole species die and nothing is left living from that species.

  12. Causes of mass extinctions • Meteor impacts • Global Warming • Oxygen levels • Sea level change • Storms • Volcanic eruptions • Possible many more things… can you think of something?

  13. 5 Major mass extinctions • Cretaceous (65mya) • 62% loss of species caused by impact and flood basalts • Triassic (210mya) • 65% loss of species caused by impact and flood basalt. • Permian (250mya) • 90% loss of species caused by impact, flood basalts, & global warming. • Devonian (365mya) • 72% loss of species caused by impact. • Ordovician (445mya) • 65% loss of species caused by ice age and sea level fall (still debated)

  14. Historic Mass Extinctions • One famous one is the K-T extinction. • Cretaceous and Tertiary periods • Where the dinosaurs died. • Now?? Humans? • Global Warming • Sea level rise • Changing CO2 level • Loss of resources

  15. Evolution • What is this? • The response to environmental changes an organism that allows it to survive. • Example: • ?Allergies • Birds beaks • Diseases • Goose bumps • Wisdom teeth • Coccyx (tail bone) • Appendix

  16. Causes • Environmental factors: • Plate tectonics • Atmospheric changes • Physical needs • Weak links die off.. • All occur over long time frames!

  17. Evidence • Birds beaks • Whales have a hip bone!? • Ancient giraffes had shorts necks • Arms of different animals have same parts.

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