Unit 4: Oceanography - Practice Quiz

1 Which of the following is the deepest trench in the world?

2 The 'S-shaped' ridge is a characteristic feature of which ocean's bottom topography?

3 Which submarine ridge divides the Indian Ocean into eastern and western basins?

4 What is the average salinity of the world's oceans?

5 Which layer of the ocean is characterized by a rapid decrease in temperature with increasing depth?

6 The 'Telegrpah Plateau' is located in which ocean?

7 Which of the following currents is a warm ocean current?

8 The presence of the 'Ring of Fire' is associated with the bottom topography of which ocean?

9 What term is used to describe the zone of rapid salinity change with depth?

10 Which of the following is an example of pelagic deposits?

11 The Labrador Current is a cold current located in which ocean?

12 Tides that occur when the Sun, Earth, and Moon are aligned in a straight line are called:

13 Which ocean has the widest Continental Shelf?

14 What are 'Guyots'?

15 Polymetallic nodules, a significant marine mineral resource, are primarily rich in:

16 The Agulhas Current flows along the coast of which ocean?

17 Which of the following factors increases the salinity of ocean water?

18 The symbiotic algae living within coral polyps are known as:

19 The Sargasso Sea is a distinct region in which ocean?

20 Which pollution phenomenon is caused by excessive nutrient runoff leading to oxygen depletion?

21 The Puerto Rico Trench is the deepest point in which ocean?

22 Ooze deposits composed primarily of calcium carbonate shells are called:

23 The periodic rise and fall of sea level is primarily caused by:

24 Which ocean current is associated with the 'El Nino' phenomenon?

25 Exclusive Economic Zones (EEZ) generally extend how far from a country's coastline?

26 The Sunda Trench is a significant topographical feature of the:

27 Ocean Thermal Energy Conversion (OTEC) utilizes what property to generate energy?

28 The Great Barrier Reef is located off the coast of:

29 Which of the following is a cold current in the Pacific Ocean?

30 Diatom ooze is a type of:

31 The gentle slope linking the continental shelf and the deep sea floor is called the:

32 Minamata disease was caused by which type of marine pollution?

33 Which sea has the highest salinity due to high evaporation and lack of river inflow?

34 The 'Great Pacific Garbage Patch' is primarily composed of:

35 The deflection of ocean currents to the right in the Northern Hemisphere is due to:

36 Which of the following represents a biotic marine resource?

37 Neap tides occur during which lunar phase?

38 Coral bleaching is primarily a response to:

39 Which current meets the Labrador Current to produce heavy fog near Newfoundland?

40 Terrigenous deposits in the ocean are derived from:

41 The deepest part of the ocean floor, which is relatively flat, is known as the:

42 Which ocean is known for the 'Ninety East Ridge'?

43 Placer deposits in coastal sands are often a source of:

44 Lines on a map connecting points of equal salinity are called:

45 What is the primary condition required for the formation of coral reefs?

46 The Benguela Current is a cold current located off the coast of:

47 A circular coral reef that encloses a lagoon but has no central island is called an:

48 Offshore drilling on the continental shelf is a major method for extracting:

49 The Challenger Rise is a submarine feature of which ocean?

50 Which of the following is NOT a major source of marine pollution?