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[DOC File]STUDY GUIDE: Classification and the Five Kingdom System
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The geologic time scale divides the history of life on Earth into four eras, delineated by major changes recorded in the fossil record. List these four eras and briefly describe some factors that may have contributed to the transitions between eras. (HINT: Consider continental drift, mass extinctions, and adaptive radiations.)
the four eras of earth

[DOC File]Big Era Four - World History
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Big Era Four has been called an “Age of Empires” because during that era several large enduring empires emerged in both Afroeurasia and the Americas. In earlier eras, most empires were relatively small and did not usually survive for such long periods of time as some empires did in Big Era Four.
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[DOC File]Geologic Eras - Miss Hamilton
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Geologic Eras The earth can be divided into four main geologic eras. An era is a span of time in the earth’s history where significant geologic events occurred.
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[DOC File]ca-fcs.org
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Four eras will be placed on one side and four on the other side. 3. All eras should be labeled. Three trends from each era, presented in three complete sentences should be included at the bottom of the timeline. (Era at the top of the page) Resources: DVD “Fashion Show through History”-www.Learning Zone Express.com
eras of american history

[DOCX File]My Site
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Do you agree or disagree with the division of world history into these four eras? List two major periods within Era 2. In 7th grade social studies we will be studying Era 1, 2, and 3. List the topics that we will most likely study. The next example of a timeline is called a Geohistogram. With a partner make three observations about this timeline.
eras of human history

[DOC File]Section 13 & 14 Study Questions - Student's Friend
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World History & Geography 2. TIMELINE: a. Use the back of this page. Draw a line lengthwise through the center of the paper, and divide it into four equal segments. b. On the line identify four main eras of history. (Don’t try to make the timeline proportional. It won’t work.)
different eras in history

The four eras of history