early humans

2. prevents sea trade for much of the year – such as in Russia in earlier times
4. a barrier to travel – separate cultures - such as the Amazon Rainforest in Brazil
8. person who studies humans past and present
9. a barrier to travel – separate cultures - such as the Sahara in Africa
10. person who studies the economy, money, business
11. a barrier to travel – separate cultures - such as the Himalayas between China and India
13. person who recovers and studies artifacts left behind by humans
14. transportation routes – sometimes through barriers - such as the Nile through the Sahara

1. person who studies the physical terrain (topography), climate, and how humans interact w/environment
3. Valley: great place to begin a civilization in ancient times - such as the Tigris-Euphrates valley
5. person who studies human society and how people interact
6. flat fertile lands – good for farming – often attract invaders - such as the Steppes of Russia
7. isolate cultures from other cultures - such as Japan
8. the expression of a culture’s ideas
12. Source first-hand or eye-witness accounts of an event