Across
- 1. a hollow rock with crystals inside
- 6. a similarity to make a comparison
- 8. a person who studies the Earth's rocks
- 9. reasonable; to be expected
Down
- 1. having Earth as its center
- 2. when one person speaks alone
- 3. a conversation
- 4. a list of records
- 5. the study of the Earth's surface
- 7. the study of points, lines, angles, and shapes