Geography

The surface of the Earth is covered both by

• Air and rocks

• Land and water

• Oxygen and carbon dioxide

• Crust and core

------------- has more land.

• Southern Hemisphere

• Northern Hemisphere

-------------- has more water.

• Southern Hemisphere

• Northern Hemisphere

This distribution of -------- and --------- throughout the world.

• Land and water

• Sand and rocks

• Water and rocks

What are the names of the three layers of the Earth?

• Crust, Mantle, Core

• Land, water, rocks

• Metalic core, inner core, outer core

The solid outer covering of the earth which envelopes its interior portion is called the -----------.

• Mantle

• Crust

• Core

• Inner core

Its average thickness varies from ------ to ---------.

• 10 to 20 km

• 5 to 40 km

• 6 to 50 km

• 7 to 90 km

In between the outer crust and the inner core, there is the -----------.

• Mantle

• Core

• Crust

Average thickness of the Mantle is about ------------.

• 3000 km

• 4500 km

• 2900 km

• 1000 km

It is --------- under the continents and --------------- under the oceans.

• Thicker and thinner

• Thinner and thicker