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3. a dustlike material that can form soil
6. farm tools were stronger and more effective leading to crop yield increasing
8. was invented in 105bc
9. a picture that represents a word or idea
10. was invented during the Zhou dynasty, as well as the use of iron instead of bronze to make weapons and farm tools
11. is a great invention of ancient China 518-600 BC

1. were also used for the first time.
2. wall to hold back water
3. a symbol that represents a word or a group of words
4. was developed in 4000-3000 BC
5. a ruling family that holds power for many years
7. bone animal bone or shell carved with written characters that was used to predict the future in Ancient China