Across
- 4. a three-sided shape
- 5. the study of shapes
- 7. glasses
- 11. to put something inside of one's body
- 13. a three-legged pod
- 15. to change or switch
- 17. the study of Earth's structures
Down
- 1. something occurring two times a year
- 2. a two-wheeled vehicle
- 3. to shoot out
- 6. a piece of writing
- 8. a formula that reverses a sickness
- 9. a person who views something
- 10. the study of myths
- 12. muscles in the upper arm
- 14. the study of electronics
- 15. a person who works in astronomy
- 16. the study of life