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1. Planet earth is also known as _____?

2. From how many years water cycle has been functioning?

3. All forms of life on earth depend on which of the following?

4. Which two of the following elements are important for life on earth?

5. Out of the following, what percentage of the water found on earth is found in the oceans?

6. What percentage of the following water that falls on the ground goes to the atmosphere through oceans and evaporation elsewhere?

7. Which two of the following forms water crisis?

8. In which five oceans is the earth’s oceanic area divided?

9. Where are the ridges, hills, sea dunes, submerged islands, trenches and ravines etc.) Are found?

10. What is average width of continental shelf?

11. Which of the following shelves is the largest in the world?

12. What is the width of siberian shelf?

13. What connects the ocean basins and continental shelf?

14. Which of the following is the depth of the shield region in meters?

15. Which of the following plains is the smoothest and flattest part of the universe?

16. What is filled in deep oceanic plains?

17. Which of the following is the depth of the deep ocean floor?

18. Which of the following troughs are important for the study of plateau flow?

19. How many troughs are discovered till now?

20. How many of the following troughs were discovered in the pacific ocean?