Early Civilizations

2. of burden - animals used to do heavy work
4. A very hard stone that creates sparks when struck by metal
6. - preserved a dead body (like ancient Egyptians did)
9. drill: A long, hard stick used to make fire by twisting it against softer wood
12. Revolution: When people changed from hunting/gathering to farming
14. Dry materials like leaves or twigs that catch fire easily
17. Crescent: Region in Middle East perfect for early farming
18. A chemical reaction between fuel and oxygen that creates fire
20. - trading goods without using money
21. herders - people who move around taking care of animals

1. Stone Age: A time period about 400,000 years ago when early humans first learned to use tools
3. A place where people live permanently
5. Moving from place to place
7. - the study of how traits are passed from parents to offspring
8. pyrite: A mineral (also called fool's gold) that makes sparks when hit against flint
10. Objects made from clay that has been baked in fire
11. Growing crops and raising animals for food
13. - to shed feathers, fur, or skin
15. Using knowledge to solve problems or make life easier
16. - wealth a woman brings to marriage
19. - Before Common Era (used instead of BC)