Across
- 1. sad
- 7. not neat
- 9. the study of very small living things such as organisms
- 10. a person who works on the heart
- 12. the study of animals
- 13. the part of the Earth that contains the land, rocks, and minerals
- 14. a tool to see tiny things
- 15. the study of the environment
- 17. the part of the Earth that contains the oceans, rivers, lakes
- 19. not equal
- 20. the study of the heart
Down
- 2. the study of the mind
- 3. not sure
- 4. not needed
- 5. the part of the Earth that contains the air
- 6. the part of the Earth that contains all living things
- 8. the study of living things
- 11. a tool to see things far away
- 16. the study of the Earth
- 18. a person who works with teeth