Across
- 3. the first plant that made farming possible
- 6. the other main river of Mesopotamia
- 8. this waste product from plants helped other forms of life succeed on Earth
- 9. one of the two main rivers of Mesopotamia
- 11. this was the first life form on earth
- 12. this climate event made rainfall for farming become unreliable
- 13. the first civilization began in this area
- 14. an animal that eats both plants and animals
Down
- 1. having no rules and laws, civilization could lead to this
- 2. having a steady crop of food led to this
- 4. an animal that only eats plants
- 5. this invention helped bypass rainfall as a major need for farming
- 7. beside controlling plants for farming what other life forms were humans able to control
- 10. an animal that only eats other animals