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Earth Sciences 14 Online
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Ethan examined several fossils to date Earth events from 4.6 billion years ago to 443 million years ago. Which of these charts best records the information obtained by Ethan? Period 4.6 bya to 3.8 bya 3.8 bya to 2.5 bya 2.5 bya to 543 mya 543 mya to 490 mya 490 mya to 443 mya Event Oxygen starts building up in the atmosphere Life appeared on Earth Sun and planets were formed Sea animals with vertebral column appear Sponges and worms began to appear Period 4.6 bya to 3.8 bya 3.8 bya to 2.5 bya 2.5 bya to 543 mya 543 mya to 490 mya 490 mya to 443 mya Event Life appeared on Earth Oxygen starts building up in the atmosphere Sea animals with vertebral column appear Sun and planets were formed Sponges and worms began to appear Period 4.6 bya to 3.8 bya 3.8 bya to 2.5 bya 2.5 bya to 543 mya 543 mya to 490 mya 490 mya to 443 mya Event Sun and planets were formed Life appeared on Earth Oxygen starts building up in the atmosphere Sponges and worms began to appear Sea animals with vertebral column appear Period 4.6 bya to 3.8 bya 3.8 bya to 2.5 bya 2.5 bya to 543 mya 543 mya to 490 mya 490 mya to 443 mya Event Oxygen starts building up in the atmosphere Sun and planets were formed Life appeared on Earth Sponges and worms began to appear Sea animals with vertebral column appear

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