Cinderellasaurus
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| What was the formation of earth's land during the Triassic period? | Pangaea, the supercontinent
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| Due to the land formation, what were dinosaurs able to do? | They were able to move around and were wide-spread.
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| Cosmopolitan | Wide-ranging and very similar to each other
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| Endemic (late cretaceous) | Particular groups restricted to differing continents
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| How do solids and fluids react to heat? | solids become hot on the surface and cool on the bottom while fluids distribute the heat more evenly.
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| Will a fluid or solid change temperature quicker? | Solid
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| How was the climate in the Triassic? | Pangaea had much more extreme temperatures and water precipitation.
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| Why were the temperatures more extreme? | There wasn't water breaking up the land forms and aiding in regulating temperature. This caused the land to heat up quickly and cool quickly.
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| Why were the seasons extreme? | monsoons in the wet season, and hot temperatures in the dry season.
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| What caused the monsoons? | Moisture from oceans (Tethys Sea) was pulled into the northern hemisphere low-pressure cell.
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| What was the Late Triassic climate? | generally warm and dry at lower latitudes, with strong seasonality.
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| What was the largest mass extinction that the world as ever experienced? | Permo-Triassic Extinction
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| What percentage of species from land and from ocean were wiped out in this extinction? | Greater than 70% for ocean species and over 50% for land species.
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| What are some theories for the cause of this extinction? | Volcanism, asteroid collisions, and dramatic changes in global sea levels.
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| What is the strongest piece of evidence for the cause of the extinction? | Massive outpouring of lava in Russia called the Siberian Traps may have released a large amount of greenhouse gases, which caused "runaway" global warming and upset the chemical balance in the oceans.
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| What were the tree species in the Triassic? | Cycads, cardioids, conifers, ginkgoes, ferns, and seed-ferns
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| How did vegetation differ from the early to late Triassic? | Early Triassic consisted mostly of pteridophyte ferns and gymnosperms. Late Triassic, gymnosperms such as conifers and cycads dominated.
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| What did gymnosperms have to ward off predators? | tough, spiny foliage and likely rich in chemical defenses.
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| Which groups of animals appeared during the Triassic? | Dinosaurs, insects, frogs, salamanders, turtles, lizards, crocodiles, and mammals
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| Triassic was not only known for "Dawn of the Dinosaurs" but for "Dawn of the ---" | "Dawn of the Modern Ecosystem"
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| What was one of the most important mammal groups during the Triassic? | Dicynodonts
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| Describe dicynodonts | slow-moving, bulky, closely related to mammals
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| Which reptiles appeared in the Triassic? | archosaurs (crocodiles, dinosaurs, pterosaurs, etc.)They all have an antorbital fenestra
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| Which group followed the first line of crocodiles? | Crurotarsi
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| Which group evolved into pterosaurs, dinosaurs, and birds? | Ornithodira
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| Which species were in the crurotarsi group? | aetosaurs, phytosaurs, rauisuchians, early crocodylomorphs (small, bipedal)
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| What is a basal dinosauromorph? | A species which is closely related to dinosaurs but not in the group.
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| What are some of the Triassic basal dinosaurs? | lagerpetids and silesaurids
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| 230 mya, which 3 species were the earliest of the dinosaurs? | Eoraptor, Herrerasaurus, and Eodromaeus
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| Where were these dinosaurs found? | The Ischigualasto Formation
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| Which is the most primitive sauropodomorph? | Panpahgia
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| Which is the most primitive ornithiscian? | Pisanosaurus
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| What were three characteristic of the first dinosaurs? | Open hip socket, distinct femoral head, and three vertebrae incorporated into the pelvis.
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| From 215 mya, how long did dinosaurs dominate? | the next 135 million years
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| What gave dinosaurs competition, or a competitive edge over other species? | Fully upright posture, bipedalism (free hands), speed, intelligence, warm-blooded
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| Does the fossil record support the competitive edge hypothesis? | No, dinosaurs lived alongside tetrapods and didn't become dominant over them.
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| How long ago was the end-Triassic extinction? | 201.5 mya
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| What did the end-Triassic extinction affect the most? What species? | Plants and animals. rhynchosaurs, dicynodonts, and aetosaurs.
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| What caused conifers to become dominant? | The absence of many groups of seed ferns
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| What is the strongest hypothesis as to what caused the end-Triassic extinction? | Mass outpouring of lava which released large concentrations of greenhouse gases. (Similar to the permo-triassic extinction)
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| Why did some dinosaurs survive through these two mass extinctions? | Luck of the draw or they have characteristics which allow them to survive intense global warming and climate change.
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Created by:
Chelseagirl2508
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