Across
- 3. Complete the sentence: In 1977, scientists found that the deep-sea floor was teeming with ______?
- 5. What organism is responsible for producing most of Earth's oxygen?
- 7. What is one environmental factor that defines ocean habitats?
- 8. We know the ocean is finite and because of this fact, what are limited?
- 10. What place on Earth receives the highest amount of rainfall?
- 12. What is one of the top predators in the ocean?
- 13. What is one component of sand?
- 15. Where did most of the rain we get originate?
- 16. Where is the most living space on Earth?
- 19. Which of the Great Lakes is the largest?
- 20. What is the deepest location in the ocean man has been?
- 21. Which ecosystem produces the most oxygen?
- 22. Which of the biogeochemical cycles is controlled by the ocean?
- 23. Name one resource we get from the ocean that may be surprising to most people.
Down
- 1. What is the largest animal on Earth?
- 2. What is one environmental factor that defines ocean habitats?
- 4. Besides most oxygen, what is another resource the ocean provides for us?
- 6. What percentage of the ocean have we explored?
- 9. Name one human activity that is a global issue
- 11. Complete this sentence: we know more about the __________ surface than the surface of the deep ocean floor.
- 12. How many oceans does our planet have?
- 14. According to chemical traces, what were the first animals on Earth, dating to over 600 million years ago?
- 17. What percentage of the planet is covered by water?
- 18. What area is an example of an inland sea?