1. organize information.
2. enough detail.
3. Earth's tilt and orbit
4. new landforms.
5. latitude.
6. polar.
7. birth rates and death rates.
8. They cannot find work.
9. subsistence farming.
10. city-state.
11. 1. organize information.
2. enough detail.
3. Earth's tilt and orbit
4. new landforms.
5. latitude.
6. polar.
7. birth rates and death rates.
8. They cannot find work.
9. commercial farming.
10. city-state.
11. 1. organize information.
2. enough detail.
3. Earth's tilt and orbit
4. new landforms.
5. latitude.
6. polar.
7. birth rates and death rates.
8. They cannot find work.
9. commercial farming.
10. city-state.
11. Volcanoes, and earthquakes. Volcanoes will erupt, spreading lava everywhere. Where that lava cools, it makes a new landform. Then when an earthquake comes the dry lava splits and its then gone, making more space for lava to flow for new landforms. Forming a cycle that makes and breaks new landforms.
12. The population is growing much faster now because of new medicines for the previously fatal illnesses. In general people live in much healthier environments today than they did 100 years ago.