Across
- 3. Early people used fire to keep away wild ______.
- 6. Early humans used dry ______ to help start a fire.
- 8. The wheel is shaped like a ______.
- 9. The wheel made it easier to carry heavy ______.
- 10. Fire gave warmth in the cold ______.
Down
- 1. Fire was discovered by early ______.
- 2. The wheel was a very important ______.
- 4. Sparks from stones could start a ______.
- 5. The first wheels were made of ______.
- 7. Early humans made sharp tools from ______.