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| https://sites.google.com/wahiawamiddle.k12.hi.us/wahiawasciences/3rd-quarter-7th-grade/7-5-3-evolution-and-7-5-5-fossils |
Since the formation of the Earth 4.6 billion years ago, much has happened. The fossil record is quite extensive, especially since the Cambrian explosion, showing a great diversity of life and adaptations over time. Explore the following websites and practice your scientific notation skills in writing out the years.
Overview of the Time Periods:
http://science.nationalgeographic.com/science/prehistoric-world/prehistoric-time-line/
More specific details since the Cambrian Explosion:
http://www.ucmp.berkeley.edu/cambrian/camb.html
Fossils from Pre-Cambrian through Tertiary Age:
http://www.fossilmuseum.net/Paleobiology/Precambrian-Fossils.htm
When Trilobites Ruled the World
http://www.nytimes.com/2014/03/04/science/when-trilobites-ruled-the-world.html
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