Topic 9 Crossword Puzzle
This printable crossword puzzle has 10 clues. Answers range from 3 to 11 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Description
The largest time on an ecological scale
The first Eon on the Earth
The earliest supercontinent
Used to determine the relative age of a layer of rock
A subdivision of an Eon
The smallest division of time on an ecological scale
The current era
The era where dinosaurs where the dominant species
The era where the first plants and animals appeared
the sedimentary layers of the rocks
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