21. Which one of the following is not a landform which results due to rejuvenation of a river?
22. In which river is "Grand canyon"?
23. A ship met with an accident at 30ºC and 35ºN. The ship was sailing in the ________
24. The tides in the Sea are primarily due to
25. When water freezes in the polar seas the salts ________
26. Of the following the busiest oceanic trade route is ________
27. Where is world's deepest trench "Mariana Trench" located?
28. The average salinity of the sea water is ________ parts per thousand.
29. Which of the following rivers falls into the Atlantic Ocean?
1. Orinoco
2. Danube
3. Amazon
4. Congo
1. Orinoco
2. Danube
3. Amazon
4. Congo
30. Sargasso sea is located in ________
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