SSLC (English Medium) कक्षा ९ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Assertion (A): The energy of the falling wave water is used to turn hydro turbines to generate power.
Reason (R): Gulf of Khambat is one of the potential Tidal energy Zones.

Assertion (A): On the basis of temperature, ocean currents can be classified as warm currents and cold currents.
Reason (R): The movement of ocean current from the low latitudes towards high latitudes cause cold current.

Assertion (A): The mid ocean ridge is probably the most extensive single feature of the earth’s topography.
Reason (R): The Mid – Atlantic Ridge is the largest unbroken oceanic ridge,

Assertion(A): Salinity is higher in closed ocean basins.
Reason(R): Enclosed ocean basins undergo little mixing with the open ocean.

What is Hypsometric curve?

Write a note on ONGC.

Explain the term

Isobath

Explain the term

Isohaline

What role is played by NIO (National Institute of Oceanography)

What do you mean by the ocean salinity?

Abyssal plains in the Atlantic and Indian Oceans tend to be extensive than the Pacific Ocean. Why?

The ocean waters are saline in nature.

Explain the term

Continental Rise

Explain the term

Oceanic Ridge

Extensive deposits of Minerals and Mineral fuels are found in ______.

Consider the following statement.

1. Submarine Fans which are similar to the alluvial fans found in water.
2. Aquatic life has a very slow rate of metabolism.
3. Dragon Hole is the deepest known underwater sinkhole in the world.
4. Abyssal plains are usually covered by a thick layer of sediments. 

Which of the following correctly matched?

Assertion (A): Continental slope is free from deposits as they are steep.
Reason (R): Abyssal plains appear as a uniform flat and featureless plain.

Assertion (A): Continental shelf is almost a uniform zone of sea bed with gentle gradient.
Reason (R): This enables sunlight to penetrate through the water.

Assertion (A): Ocean currents are in clockwise motion in the Northern Hemisphere and in the anti-clockwise motion in the Southern hemisphere.
Reason (R): The movement of ocean currents from high latitudes to low latitudes is called warm currents.