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

Write a note on the internal and external processes of Earth.

How are volcanoes classified based on the periodicity of their eruptions?

Explain the effects of Volcanoes.

On the given outline map of the world, mark the following:

Pacific Ring of fire

Give Reasons:

Chemical weathering is predominant in hot and humid zones.

The temperature of the ocean waters generally_______ at greater depth.

Ocean currents are produced due to ______.

Consider the following statements.

1. Most of the fishing grounds occur in areas where the continental shelf is wide.
2. Fishing is well developed in warm tropical watersMixing of warm and cold currents facilitates plant nutrients for fish.
3. Inland fishing became significant in India.

The oceanic ridge comes into existence due to.

Which of the following indicates the correct sequence of the topography beneath the surface of the sea?

Which of the following is not correctly matched?

1. Gulf Stream - Pacific Ocean
2. Labrador current - North Atlantic Ocean
3. Canary current - Mediterranean sea
4. Mozambique current - Indian Ocean.

Assertion (A): Oceans are always shown in blue in maps.

Reason(R): It indicates the natural colour of the oceans.

Assertion(A): Flat-topped seamounts are known as Guyots.

Reason(R): All guyot features are of volcanic origin.

Assertion(A): Submarine canyons are deep gorges on the ocean floor.

Reason(R): They are mainly restricted to continental shelf, slope and rise.

Assertion (A): Atolls are more common in the Atlantic ocean.

Reason(R): The marine population at the depth is less.

Match the following:

Mention the various relief features of ocean floor.

What are the factors that generate the ocean currents?

Write a brief note on sea waves.

The northern hemisphere and the southern hemisphere are called land and water hemispheres respectively.