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- 1. Multiple Choice_______________ is the long span of time that begins geologic time.Precambrian TimeCenozoic Time
- 2. Multiple ChoiceA unit of geologic time that subdivides erasperiodtime span
- 3. Multiple ChoiceThe Triassic Period, the Jurassic Period, and the Cretaceous Period occurred in what era?CenozoicMesozoic
- 4. Multiple Choice_________ for many of the geologic periods come from places around the world where geologists first described the rocks and fossils of the period.timenames
- 5. Multiple ChoiceScientists chose where units of geologic time began on major changes in ______________ at certain times.life formsevents
- 6. Multiple ChoiceScientists divided the time between Precambrian Time and the present into three units of time, or eras.TrueFalse
- 7. Multiple ChoiceTo develop the geologic time scale, scientists studied rock layers and fossils from the different eras.TrueFalse
- 8. Multiple ChoiceEras are subdivided into units of geologic time called periods.TrueFalse
- 9. Multiple Choice___________ a record of the geologic events and the evolution of life forms as shown in the fossil record.ErasGeologic Time Scale
- 10. Multiple ChoiceThe Quaternary period, where humans first appeared, is in the Mesozoic era.TrueFalse
- Answer choicesTagsAnswer choicesTags