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Middle to Recent Earth History

Middle to Recent Earth History. Sci 4.3. Mesozoic era 248-65 mya. Pangea breaks into Laurasia and Gondwanaland. Question 1. Drier climates. Favored reptiles Big dinosaurs by Jurassic Some may’ve been warm-blooded. Apatosaurus. Tyrannosaurus. Question 2.

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Middle to Recent Earth History

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  1. Middle to Recent Earth History Sci 4.3

  2. Mesozoic era 248-65 mya • Pangea breaks into Laurasia and Gondwanaland

  3. Question 1

  4. Drier climates • Favored reptiles • Big dinosaurs by Jurassic • Some may’ve been warm-blooded

  5. Apatosaurus Tyrannosaurus

  6. Question 2

  7. Modern reptiles different from dinosaurs • Some good mothers, some quite fast (40mph) Maiasuara Gallimimus

  8. Question 3

  9. 1st mammals in Triassic Period • Warm-blooded, hair, produce milk for young Eomaia scansoria

  10. Question 4

  11. 1st birds in Jurassic • Evolved from small dinos Archaeopteryx fossil

  12. Question 5

  13. Gymnosperms • Dominated most of Mesozoic yew pines palms

  14. 1st Angiosperms in Cretaceous • Flowering plants • Seeds with hard coverings • Dominant plants today Southern magnolia

  15. Question 6

  16. End of Mesozoic • 65 mya mass extinctions • Huge meteor and/or volcanoes Gravity map

  17. K-T boundary 65 mya • Between Meso. And Ceno. eras • High levels of iridium

  18. Alternate theory

  19. Question 7

  20. Cenozoic era • 65 mya to today • Mountain ranges formed: Alps, Andes, Himalayas Himalayas

  21. Alps in Europe Med. Sea • African plate smashing into Eurasian plate African plate

  22. Andes • Longest mountain • range in the world Nazca plate S.A. plate

  23. Himalayas are highest in the world • Indian plate smashing into Eurasian

  24. Question 8

  25. Mountains may have caused global cooling • Earth has cooled for last 60 mil.

  26. Question 9

  27. Cenozoic dominated by mammals • Many evolved into larger animals

  28. Question 10

  29. Some evolved to live in the sea

  30. Question 11

  31. Continents isolated species • Marsupials dominate Australia

  32. Lemurs only found in Madagascar

  33. Question 12

  34. Organize in order of appearance on earth • Amphibians • (and insects) • Vertebrates (fish) • Mammals • Reptiles • Invertebrates • Invertebrates • Vertebrates (fish) • Amphibians • (and insects) • Reptiles • Mammals • Birds • Flowering plants

  35. Himalayas Andes Alps Rockies Appalachians

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