Oceanography multiple choice questions(mcqs) and answers

1 Which factors influence ocean currents ?

I. Earth's rotation(Coriolis force)

II. Winds across the ocean

III. Density of the water

IV. Convection Currents

A (I), (II) and (IV)

B (II), (III) and (IV)

C (I), (II) and (III)

D (I), (II), (III) and (IV)

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Answer: Option [D]
The correct answer is (I), (II), (III) and (IV). Winds, water density, and tides all drive ocean currents. Coastal and sea floor features influence their location, direction, and speed. Earth's rotation results in the Coriolis effect which also influences ocean currents.

2 Which of the following influence the oceanic salinity ?

A land

B wind

C river

D ash from volcanoes

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Answer: Option [C]
The correct answer is river. Ocean Salinity is affected by several factors. These are evaporation, rainfall, river water influx, ocean currents, atmospheric pressure, wind direction, and global warming.

3 The names of four oceans are given below :

I. Atlantic

II. Arctic

III. Indian

IV. Pacific

A (II), (I), (IV), (III)

B (IV), (I), (III), (II)

C (I), (III), (II), (IV)

D ((III), (II), (I), (IV)

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Answer: Option [B]
The correct answer is (IV), (I), (III), (II). Historically, there are four named oceans: the Atlantic, Pacific, Indian, and Arctic.

4 Which two seas are connected by the Suez canal ?

A Red Sea and Arabian Sea

B Red Sea and Mediterranean Sea

C Arabian Sea and Mediterranean Sea

D North Sea and Baltic Sea

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Answer: Option [B]
The correct answer is Red Sea and Mediterranean Sea. Canals have several advantages so several canals were dug out throughout the world. Canal construction also needs some geological resources which were basics for construction.The presence of two seas Mediterranean Sea and red sea helped to construct the Suez canal.

5 In which of the following the direction of Ocean currents are reversed with season ?

A In the Pacific Ocean

B In the Atlantic Ocean

C In the Indian Ocean

D In the Arctic Ocean

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Answer: Option [C]
The correct answer is in the Indian Ocean. The current systems of the Indian Ocean are largely controlled and modified by landmasses and monsoon winds. The currents in the northern Indian Ocean change their flow direction twice a year due to north-east and south-west monsoon winds.