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uYuSs uYuSs
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Posts: 1005
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6 years ago
Some 35,000 years ago, our ancestors learned that heating clay to high temperatures allowed it to harden substantially. Many years later, using this earlier knowledge, our ancestors invented pottery. Pottery is classified as a:
 
  a. primary invention
 b. secondary innovation
  c. primary application
 d. tertiary modification
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Kingpin112Kingpin112
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6 years ago
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uYuSs Author
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6 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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Brilliant
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2 hours ago
Helped a lot
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