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A Mini-Lesson

 

13 Ways to Tell Time
Backwards

 

author unknown

 

 

EVOLUTION

Geo/Paleo Patterns

Time

 SYNOPSIS

Students explore different ways gelogical time can be measured: comparing the time dimensions for each method, the mechanisms of each method, and the materials used.

 CONCEPTS

Geological time can be measured in several different ways, providing independent lines of evidence for measuring deep time and sequencing geological and biolgical events of the past.

 MATERIALS

Dating-Methods graph
Text: "13 Ways to Tell Time Backwards" (2 pages)
Work sheet to help students to extract info from text

 STUDENT HANDOUTS
 

 (see end of lesson for the formatted handouts).

See materials

 TEACHING STRATEGY

To be used in conjunction with a timeline activitiy or the "Time Machine", either before or after. Also can be used with a lesson on the concept of half-life and radiometric dating.

Hand out the 4 pages (graph and worksheet can be back-to-back, as can the 2 pages of the text, making 2 sheets total).

Should take no more than one 45-55 minute period, or as take-home assignment.

RESOURCES:

Strahler, Arthur N. Science and Earth History. 1987. Prometheus Books. Ch. 17 & 19.

TalkOrigins Archive; "Radiometric Dating and the Geological Time Scale".

 ATTRIBUTION

Some of the ideas in this lesson may have been adapted from earlier, unacknowledged sources without our knowledge. If the reader believes this to be the case, please let us know, and appropriate corrections will be made. Thanks.

1. Original Source: Larry Flammer, 7/95

2. Reviewed / Edited by: Martin Nickels, Craig Nelson, Jean Beard: 12/15/97

3. Edited / Revised for website by L. Flammer 8/99

PDF FILES

 Text (2 pages)

Dating Methods graph

Work Sheet

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For Netscape Communicator: EDIT>Preferences>Navigator>Applications (then scroll down to "Portable Document Format (PDFViewer)", click on it, then click OK; if it's not there, click on "New", and add it in).

For Netscape Navigator: OPTIONS>General Preferences>Helpers (scroll to check for PDF on list, add it if it isn't, then click OK to activate it.

For other browsers, or problems with this, check with your browser tech support, Adobe tech support, or, in dire frustration, e-mail me. If nothing else, I will mail you hard copy of the formatted pages desired.


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