UNIT ONE

1. ________ developed 10,000 years ago
2. Before Europeans, most North American "Indian" culture was __________.
4. system of knots used to communicate by tribes in Peru
7. ______ are associated with the Ozarks
10. ____ hunting is a big sport in the Mississippi Alluvial Plain.
11. the ______ Coastal Plain region was once under the sea and is now rich in minerals from its time underwater
12. The _____ Mountains are long narrow ridges that run east to west in the western part of Arkansas
15. added the zero to math
17. the _____ River is one that is located in the Mississippi Alluvial Plain
18. Crowley's ridge is a ______-shaped raised ridge in eastern Arkansas

1. sacrificed beating hearts
3. there are six geographical _____ in Arkansas
5. Culture disappeared and their civilization was reclaimed by jungle
6. The Ozark "mountains" are really a single ____.
8. the land mass on earth before tectonic plates shifted
9. an important stone used for tools by Native Americans in the Ouachita Mountains
10. The Mississippi Alluvial plain is also known as this
13. ruled by an emperor
14. ______ and Native Americans share a genetic marker.
15. public service to a ruler
16. The first inhabitants of the Americas migrated across the _______ Strait.