Geologic eras and periods
Notes on Diversity of Life, Fossils and Geologic Time
These two eras take up 85% of the total length of geologic time. Because this would make the adding machine tape so long we are only going to include the last three eras, which marks the beginning of the abundant fossil record. Objectives: To compare and contrast relative lengths of the geologic eras, periods, and epochs. Materials:
[DOC File]Geologic Timeline – Reference Table HW
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The Earth’s years have been marked by geologic, environmental, and biological changes. Earth’s history is broken into large divisions called eons then eras, periods, and epochs. These categories help geologist better understand Earth’s long history. In this project you are going to take a closer look at one small part of Earth’s long ...
[DOC File]Making a Geologic Time Line - Minnesota Earth Science ...
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Geologic Time Scale Foldable. Take a piece of plain paper and fold it so there are 4 sections. On the outside flaps, you will label each of these for the 4 ERAS of Geologic Time. Precambrian. Paleozoic. Mesozoic. Cenozoic. Inside. the foldable: On the top section on the inside: draw 4-5 pictures to represent the organisms that were living ...
[DOC File]Geologic Time - Mr. Ahearn's Earth Science
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Geologic, eras, periods and epochs. (See attached geologic timeline.) Procedure: Using long lengths of paper and meter sticks, students will make a timeline of the earth’s history, 4.5 billion years.
[DOC File]Geologic Time
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Doing each geologic time period in a different color. Using different colors to label geologic and biologic events. Using a key for days that become cluttered. Geologic Time Periods Event and Years Ago ÷ = Model – Days Ago Start Precambrian Era - 4.6 bya 12,602,740 = Start Paleozoic Era – 540 million years ago 12,602,740 =
Geologic Time Scale Foldable
Earth's history is subdivided into eons, which are subdivided into eras, which are subdivided into periods, which are subdivided into epochs. The names of these subdivisions, like Paleozoic or Cenozoic, may look daunting, but to the geologist there are clues in some of the words.
[DOC File]Geologic Time Scale
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Geologic Timeline – Reference Table HW. List these 3 geologic eras from oldest to youngest: Mesozoic, Cenozoic, Paleozoic. List the . 3 periods. that make up the . Mesozoic. era, in order from oldest to youngest. Which period is older – Devonian or Silurian? How long did the . Jurassic. period last? How long ago did the . Precambrian. era ...
[DOCX File]Lesson Plan: Understanding Geologic Time - Casper College
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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).
Geologic Time Scale: A List of Eons, Eras, and Periods
773 Each era is divided into smaller units called periods. 774 The changing fossil record also played an important part in establishing each of the periods. 775 Periods may be divided into epochs. Seven epochs are names for the periods of the Cenozoic era. 776 The epochs of other periods usually are just termed early, middle, and late.
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