Across
- 3. an event where people came from all over the world to search for gold
- 4. Ghost Town that became a tourist attraction
- 6. a polygon with four sides
- 9. to decay; to separate into constituent parts
- 12. information or proof which helps form a conclusion
- 14. an angle whose measure is between 0 degree and 90 degrees
- 17. nickname of miners who rushed to California
- 19. an angle whose measurement is between 90 degrees and 180 degrees.
Down
- 1. method of sifting for gold with water
- 2. a pattern in which corresponding values are related by multiplication
- 5. having two values written in a fixed order within parentheses
- 7. an angle whose measure is 90 degrees
- 8. to keep safe from destruction or injury
- 10. a pattern in which corresponding values are related by addition
- 11. the living parts of an ecosystem
- 13. the trace or remains of ancient organisms preserved in rock
- 14. nonliving part of an ecosystem
- 15. all living and nonliving things in a certain environment
- 16. San Francisco was an example of this
- 18. mill where gold was discovered.