Each of the sevenr geological time periods consist of about ten different plants or animals that thrived during that time period. There are beautiful image cards, interesting text cards written as riddle stories, labels and control cards. This makes a nice extension work to go with your timeline of life lessons. The set has cards for the following time periods: hadean (black), archean (gray), proterezoic (yellow), paleozoic (blue) mesozoic (brown), cenozoic (green) and neozoic (red). The material is laminated (5 mil), trimmed and ready for immediate use.

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