Prepare a model of the ocean floor.

Give geographical reasons:

The disposal of waste materials in the oceans by man is harmful to the environment.

Observe the map on Pg. 27 in 'Give it a try' and answer the following questions:

(a) Madagascar and Sri Lanka are related to which landform of the ocean floor?

(b) Near which continent are these landforms located?

(c) Which islands in our country are examples of peaks of submerged mountains?

• Continents and oceans are a part of the lithosphere and hydrosphere respectively.

• Continents and oceans lie on plates

• During low tides, the level of ocean water goes down and the land below the water near the coast is exposed.

• Ships wreck when they strike against the rocks in the ocean.

If the above points are correct, then select the most appropriate option from the following:

 The surface of the earth is occupied by land and water

 There is land below the ocean too.

 Even if the water has the same level, the land submerged is not even.

 The level of water and land is uneven.

 Discuss in the class regarding the choice of your options. Know from your teachers about the correct option.

If the classification of landforms on land can be done on the basis of altitude and size, then how can the landforms submerged under water be classified?