Across
- 4. form of communication when no one could speak
- 6. Scientist who studies prehistoric people by looking at artifacts
- 7. strip of land that connects two continents
- 8. An early ancestor that developed in Africa and moved around the world
- 9. Early humans that gather and hunt so they survive
Down
- 1. old stone age- used stone tools and moved to survived
- 2. new stone age- stopped moving and started farming
- 3. Climate change when glaciers covered the earth
- 5. Constantly moving from place to place for basic needs