Across
- 3. the things that stay the same
- 5. used to map seafloor depths and formation
- 6. results/what you are measuring
- 8. living
- 9. an educated guess
- 10. discovered that the sea-floor life varies at different depths
- 12. non-living
- 13. the first marine biologist that found the gills are the breathing apparatus of fish
Down
- 1. the group that you are using as a baseline to compare your results to
- 2. the one factor you're changing
- 4. the fourth step in the scientific method
- 7. unmanned and tethered devices that consist of a long line or cable with an anchor at one end, a float at the other, and instruments attached to the line in between or to a float at the surface.
- 11. used for the study of the marine environment for longer periods and at depths otherwise unavailable to humans