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This earth history timeline activity relates events in the geologic past to distances measured on a piece of adding machine tape. Further activities are used to help the students visualize the sequence and spacing of the events. The site also contains numerous and varied links that will aid both the teacher and students in performing this activity. These links lead to detailed information on the stratigraphy, ... Full description.
Grade level: Intermediate (3-5), Middle (6-8)
Resource type: Classroom activity
Subject: Geologic time
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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This lesson develops the idea that carbon dating is based on gathering evidence in the present and extrapolating it to the past. Students will use a simple graph to extrapolate data to its starting point. This lesson is the third in a three-part series about the nucleus, isotopes, and radioactive decay. Students will be asked to consider the case of when Frosty the Snowman met his demise (began to ... Full description.
Grade level: High (9-12)
Resource type: Lesson plan
Subject: Geologic time
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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This activity has students compare the magnitude of geologic time with spans of time in a person's lifetime, which is often difficult for many students. They use a long paper strip and a reasonable scale to represent visually all of geologic time, including significant events in the development of life on earth as well as recent human events. This activity provides students with an opportunity to ... Full description.
Grade level: Middle (6-8), High (9-12)
Resource type: Classroom activity, Guide for instructor
Subject: Geologic time
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
Pedagogical help
Assessments: Read (1)
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This time line lays out Earth's history within a 24-hour time period, from Earth's formation out of stellar dust up to the last Ice Age. Elementary, middle and even high school students will be surprised to discover that the most familiar human history is not even on the time line because it took place in the final second. The time line illustrates that if earths history had unfolded on one single ... Full description.
Grade level: Intermediate (3-5), Middle (6-8), High (9-12)
Resource type: Ref. material
Subject: Geologic time
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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This handout lists major events in Earth history with approximate ages (in millions of years before present). The calendar date is determined by setting midnight, January 1, to correspond with the formation of the Earth, and setting the following midnight, December 31, to correspond to the present. Thus, the entire history of the Earth is displayed as a single calendar year. Full description.
Grade level: Middle (6-8), High (9-12), College (13-14)
Resource type: Presentation / Demo
Subject: Geologic time
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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This project aims to reconcile the international stratigraphic standards with many of the regional and archaic naming schemes that appear in the literature. In the process, the most recent International Commission on Stratigraphy (ICS) time scale has been combined with information on the estimated placement and length of other stages in order to put approximate dates on all of the stratigraphic intervals ... Full description.
Grade level: High (9-12), College (13-14), College (15-16), Graduate / Professional
Resource type: Ref. material, Modeled dataset
Subject: Geologic time
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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This time scale allows students to select multiple time periods from a list and view them on a highlighted display. It shows the relationship between eon, era, period, sub-period, and epoch and also includes the date in mega-annum (Ma) or millions of years before present. The scale reflects the changes in the Cenozoic Era (Tertiary and Quaternary have been eliminated and the Neogene modified) in the ... Full description.
Grade level: Intermediate (3-5), Middle (6-8), High (9-12)
Resource type: Visualization - scientific, Calculation / Conversion tool
Subject: Geologic time
 
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Educational standards associated with this resource:
National Science Education Standards (NSES): Read
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This broadcast describes the four great Eons of history: the Hadean, the Archean, the Proterozoic and the Phanerozoic. Together, they encompass four and a half billion years. How can we begin to make sense of such a huge swathe of time? And can we be sure that we have got the age of the Earth right? Geologists use Eras, Periods and Epochs to further punctuate what is known as Deep Time, but can we ... Full description.
Grade level: High (9-12), General public
Resource type: Radio broadcast
Subject: Geologic time
 
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This is the geological time scale developed by the British Geological Survey. The principal chart is the Phanerozoic (Cambrian to Quaternary) timescale. The names of the individual periods are live links, each one leading to a chart showing the subdivisions of each period into epochs and ages. The Proterozoic and Neoproterozoic sections are also linked to further subdivisions into eras and periods. ... Full description.
Grade level: Middle (6-8), High (9-12), College (13-14)
Resource type: Illustration - scientific, Ref. material
Subject: Geologic time
 
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In this activity students convert major events in Earth history from years before present into scale distances. After a list of events and their scale distances have been formulated, students construct a geologic time scale on 5 meters of adding machine paper, beginning with the formation of the Earth. Students will investigate change through geologic time; design, construct and interpret a model ... Full description.
Grade level: Intermediate (3-5), Middle (6-8), High (9-12)
Resource type: Classroom activity
Subject: Geologic time
 
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Educational standards associated with this resource:
National Science Education Standards (NSES), National Geography Standards: Read
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