Clock of Eras

From Azoka Company

Share
Looking at “cosmic hours,” children have another way to grasp the concept of the relative amounts of time it took for Earth to form and for different types of life to develop.

Comes with a colored control (15” x 20”) on poster board, pre-cut arrows and key, and a set of loose chart pieces for laying out during the presentation.

Revised in 2014 based on information from the International Commission on Stratigraphy. New colors match those used by ICS. This Notes for the Teacher PDF explains the rationale for the revision.
Item No. Product Name Price Qty
EM105 Clock of Eras - Revised 2014
$45.00
In Stock

For guaranteed Christmas delivery (in stock items) choose Expedited Air and order by 12/21.

Clock of Eras

  • zoom