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- what geology was occuring aroung the cambrian explosion that may have contributed to this diversification of life?What major climatic and biological events happened during thePleistocene?Scientists who study forms of marine life that lived more than200 million years ago usually obtain fossils not from the sea floor, butfrom areas that were once under sea and have been uplifted onto thecontinents. Why?
- Define - The Carboniferous period ?''Cambrian Explosion'' What contributed to this explosion of life? What were Earth conditions like and in what ways were the multicellular animals becoming different to those of the Ediacaran Period? Additionally, which form(s) of life were likely to be human ancestors during the Cambrian?What was the “Cambrian explosion” and how might you explain it?
- What's the largest unit of geologic time, lasting hundreds of millions of years? A. Era B. EonC. Epoch D. PeriodDuring what era did pangs begin to break up? A. Cretaceous B. TriassicWhich of the following is not a fossil?a. Dried-out animal bones in a layer of desert sandb. A patch of fur encased in amberc. A woolly mammoth frozen in Arctic permafrostd. Remains of an extinct whalelike animale. The impression of a plant leaf in sandstonef. The wrinkly texture of shale imprinted withbiofilms in sediments
- Which of the following periods is the earliest during which animals may have appeared? a. Ordovician period b. Cambrian period c. Ediacaran period d. Cryogenian periodFor this activity, you will be reviewing the geological time scale in the module readingassignment from the Geological Time chapter in the PRI Digital Atlas of Ancient Life –online textbook and the Earth History chapter from the OER Commons Earth ScienceTextbook. Use the images of the geologic time scales in your readings to help you makeyour Geologic Time Scale concept sketch nstructions:Sketch and label a geologic time scale. Include dates of the following events in EarthHistory on your time scale in the appropriate time period (you may have to look these up onthe internet but most are listed in your readings). First appearance of free oxygen in the atmosphere Earliest fossils Oldest animal fossils Great Dying Extinction (worst mass extinction at end of the Permian Period) – alsoexplain possible causes of this extinctionArchaeopteryx sp. appeared First Flowering PlantsTyrannosaurus rex appeared K-T Extinction event (Dinosaurs died out) – also explain possible causes of…The____ tool industry characterizes the Middle Paleolithic / Middle Stone Age and spans the time from____ - ____ years ago. a. Acheulean; 1 million - 500,000 b. Oldowan; 200,000 - 100,000 c. Mousterian; 300,000 - 40,000 d. Mousterian; 100,000 - 10,000