Test: Major Domains Of The Earth - 1

Geologists call the outermost, brittle, mechanical layer the lithosphere. The lithosphere is made of the crust plus the uppermost part of the mantle.

If you look at Earth from outer space, one thing is obvious: Earth is blue. Water is everywhere. Approximately 71% of Earth is covered in water. Water is found in rivers, lakes, streams, and oceans. Water is stored underground as groundwater. Some water is trapped in ice. Water can even be found in our atmosphere in the form of water vapor. All of the water found on Earth is called a hydrosphere.

Historically, there are four named ocean basins: the Atlantic, Pacific, Indian, and Arctic. However, most countries - including the United States - now recognize the Southern (Antarctic) as the fifth ocean basin. The Pacific, Atlantic, and Indian are the most commonly known.

India is a country except the other three continents.

The atmosphere is composed mainly of nitrogen and oxygen, which make up about 99 per cent of clean, dry air. Nitrogen 78 per cent, oxygen 21 per cent and other gases like carbondioxide, argon and others comprise 1 per cent by volume. 

The only ocean named after a country is the Indian Ocean. Indian ocean is named after the country 'India' and is the third largest ocean in the world. The area occupied by the ocean is 20% of the earth's total surface area. The Indian Ocean is, both geographically and politically, the most complex ocean of the world.

These are the four major domains of the earth

LITHOSPHERE
HYDROSPHERE
ATMOSPHERE
BIOSPHERE

An atmosphere is a sheet of gases that surround material body or a planet. It is controlled by the gravity of that body. Argon, oxygen and nitrogen form the three main constitutions of the atmosphere.

The lithosphere (from the Greek for "rocky" sphere) is the solid, outermost shell of a rocky planet. In the case of the Earth, the lithosphere includes the crust and the upper layer of the mantle that is joined to the crust. The lithosphere contains a rich variety of minerals.

By area, Asia is the largest continent at 44,391,162 square km. It is also the largest by population with more than 4 billion people. There is quite a bit of debate as to how many continents there are. Some areas of the world combine Asia and Europe into one continent called Eurasia.