Across
- 4. the study of the earth
- 7. a light, fast motorboat designed to skim over the surface of the water
- 8. one who studies stars
- 9. a person who goes to space
- 10. the study of water
- 11. informing someone about the authors life
- 12. the branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs
- 13. one who studies earth
Down
- 1. one who studies water
- 2. the study of the physical features of the earth
- 3. the study of life
- 5. one who studies life
- 6. a book about someone's life
- 8. the study of the stars
- 9. a medicine you take
- 10. an instrument for measuring the density of liquids