American Civilizations

2. Corn, beans, and squash grown together to prevent soil evaporation and weeds
3. A buffalo hide bag
4. Portable homes built by Plains tribes to follow the buffalo migrations
7. Food platforms built on the water that self-irrigated
8. Incan rope necklace with knots to represent numbers
10. South American civilization that carved terraces into the Andes Mountains
11. Central American civilization which built floating gardens
12. When humans change their behavior and use the provided resources to survive their environment.
13. Creates room for growing crops and ashes help to fertilize the soil

1. The practice of modifying the landscape to bring more water to crops.
4. Steps carved into hillsides for growing food in the mountains
5. Clay houses built to withstand the extreme temperatures of the Southwest deserts
6. When humans change their environment to suit their needs.
9. Central American civilization that practiced slash-and-burn agriculture