Across

1. factors that might affect observations

3. the name of Darwin's famous ship.

7. ships use sonar by _______ a loud pulse of sound off the bottom of the ocean.

8. using reason from several principles to come up with specific conclusions

10. ______ is a ship that can turn up and sit vertically as a marine research station.

11. Carried out extensive sea floor dredging in the mid 1800's

12. ________was developed in WWII and became a great oceanography tool.

14. a set of procedures by which scientists learn about the world.

16. an underwater robot that can take pictures

20. an educated guess that can be tested.

21. a type of reasoning in which one starts with a number of separate observations 
    and arrives at general principles.

22. First sea captain to carry a naturalist on board.

24. ______ is a camera that can be attached to the back of an animal.

25. oldest marine lab in the U.S.

26. During the dark ages, only these people kept exploring.

27. SCUBA was invented by Gagnan and _____.

Down

2. ______ is a famous deep-sea submarine operated by Woods Hole Marine station.

4. _____ is the study of living things in the ocean.

5. The first Marine Biologist

6. ____ embarked on the first expedition to sail around the globe.

9. known for his theory on how coral reefs form.

13. _______ is the study of the physical properties of the ocean.

15. the author friend of Ricketts

17. A famous Oceanographical research site in La Jolla, CA.

18. ______ is an underwater research facility.

19. a well-loved marine biologist from the Monterey area

23. The first voyage primarily for Oceanographical research.