Time ages periods and eras
Geologic Time Scale: A List of Eons, Eras, and Periods
eras are divided into periods. periods can be further divided into epochs. Major information found on the geologic time scale includes: Precambrian is the name given to the earliest span of time in Earth history. Geologists divide the time between Precambrian and the present into three long units called eras (Paleozoic, Mesozoic, Cenozoic).
[DOC File]Major Life Events - Mrs. Cline's Science Class!
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Certain fossils occur within each time interval, and intervals often begin or end with extinction events. As shown on Figure 6, the largest divisions are called eons, each of which is subdivided into eras. Eras in turn consist of sections called periods, which contain smaller sections, known as epochs.
[DOC File]Making a Geologic Time Line - Minnesota Earth Science ...
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As temperatures decreased during the ice ages, new species that were adapted to life in c. ooler climates appeared. Mammals became the dominant life-form and underwent many changes. The Cenozoic Era is divided into two. periods: the Tertiary Period and the Quaternary Period. Quaternary and Tertiary Periods. The Tertiary Period includes the tim
[DOCX File]Chapter 3—Time and Geology
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After all the eras, periods, and epochs are drawn and labeled, go back and add the significant events in BLACK Find there exact location, mark it with a small vertical line and remember to label it and include the time ( ____ mya).
[DOCX File]Geologic Age Dating
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This time scale was developed gradually, mostly in Europe, over the eighteenth and nineteenth centuries. Earth's history is subdivided into eons, which are subdivided into eras, which are subdivided into periods, which are subdivided into epochs.
Notes on Diversity of Life, Fossils and Geologic Time
Eras, Epochs and Periods. a. Eras are considered the highest level of time organization. Some begin from an arbitrary point and some from an important date or event. They span many years and are divided into epochs. b. An epoch begins at a reference point from which time is measured; sometimes this is a specific calendar date and sometimes it ...
[DOC File]I
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1. Make a geological time scale where one inch is equal to 100 million years. Plot this on a long piece of paper. Make the geological time scale wide enough so that you can write the names of the Eons, Eras, and Periods comfortably in the space you provide.
[DOC File]Modeling the Geologic Time line and the Development of ...
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Each eon is divided into eras and each era into periods. Students can then view events in their own life with events in the history of Earth. In addition, they learn the difference between relative time (whether one event came before another) and absolute time (how many years ago something happened).
[DOCX File]Henry County Schools / Overview
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The scale should model the real time of planet earth. Students can choose to construct a linear geological time line or compare the geologic time scale to a year, month or day on earth, etc. Be creative! Using “table 23.1”, plot the different divisions: eras and periods on your time scale.
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