Directions complete the paragraph by filling up the blank with the correct word from the box
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Answer:
1. 4.6 billion years ago
2. Earth
3. Zircon Crystals
4. Stromatolites
5. 3.0 billion years ago
6. Ocean
7. Mesozoic Era
8. Cenozoic
9. Homo erectus
10. Human Being
Explanation:
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