I. Blue mud covers the largest area of ocean.
II. Green mud is found in abundance on the sea floor near the Cape of Good Hope.
III. Grey colour of Green Mud is because of mineral Glauconite.
IV. Red clay is the most widespread Pelagic deposit.

I. Tides are of great help in navigation and fishing.
II. High tide enables big ships to enter or leave the harbour safely.
III. Tide prevents siltation in the harbours.
IV. Kandla and Diamond Harbour are tidal ports.
Which of the statements given above are correct?

I. Any water in sea or lake is neither close to bottom nor near the shore can be said to be in pelagic zone.
II. Pelagic life decreases with increasing depth.
III. Demersal zone lies between benthic and pelagic zone.

I. The speed is reduced considerably.
II. They attain enormous height.
III. They appear as a gentle rise and fall of the sea.

I. It relates to salinity change only.
II. Pycnoclines normally follows halocline.
III. It is a subtype of chemocline.

I. Littoral deposits generally contains gravels, sand, silt, clay.
II. Terrigeneous deposits are usually deposited at shallow depths.
III. Deep water deposits contain coral mud, volcanic mud.

I. Only micro-organisms live in Benthic zone.
II. Benthic zone extends downwards along the surface of continental shelf.
III. Organisms living in Benthic zone are called Benthos.

I. OMT is measured up to a depth of 26°C isotherm which is 129 meters in the South-Western Indian Ocean during January to March.
II. OMT collected during January to March can be used in assessing whether the amount of rainfall in monsoon will be less or more than a certain long-term mean.

I. It is driven by density gradient.
II. It includes both the processes of sinking and upwelling of water.
III. State of circulation has large impact on climate of Earth.
IV. It is sometimes called ocean conveyor belt or meridional overturning circulation.

I. The direction of Canary current is North to South.
II. The direction of Benguela current is South to North.
III. The direction of North Atlantic drift is West to East.
IV. The Direction of California Current is North to South.

I. The annual range of temperature is greater in the Pacific Ocean than that in the Atlantic Ocean.
II. The annual range of temperature is greater in the Northern hemisphere than that in the Southern hemisphere.
Which of the statements given above is/are correct?

I. When Sun and Earth is at minimum distance.
II. When Moon is farthest from Earth.
III. When Moon is nearest to the Earth.
IV. When Moon is at 90° to Sun.

I. Water does not move forward.
II. Water particles within a wave move in circular motion.
III. Sea waves radiate outward from generating area.
IV. Longer wavelength move more rapidly.

I. Humboldt Current
II. Brazil Current
III. Oyashio Current
IV. Canary Current

I. Ocean currents are the slow-surface movement of water in the same.
II. Ocean currents assist in maintaining the Earth’s heat balance.
III. Ocean currents are set in motion primarily by prevailing winds.
IV. Ocean currents are affected by the configuration of the ocean.
Which of the statements given above are correct?