Test: Major Domains Of The Earth - UPSC MCQ

The mountain range that separates Europe from Asia is A: The Urals
The Urals are a mountain range that stretches approximately 2,500 kilometers from the Arctic Ocean to the Ural River, located in Russia. These mountains form a natural boundary between the continents of Europe and Asia.

Carbon dioxide (CO₂) is the primary greenhouse gas responsible for global warming due to its ability to trap heat in the Earth's atmosphere. The increasing concentration of CO₂, largely caused by human activities, has resulted in an enhanced greenhouse effect and subsequent climate change.

Nitrogen is the major constituent of Earth's atmosphere by percent. It makes up about 78% of the atmosphere. Oxygen is the second most abundant gas, constituting about 21%. Hydrogen and carbon are present in much smaller amounts in the atmosphere.

The major domains of the Earth are:

A: Lithosphere - The solid outer layer of the Earth, including the crust and uppermost part of the mantle.

B: Hydrosphere - All the water on Earth's surface, including oceans, lakes, rivers, groundwater, and atmospheric water vapor.

D: Atmosphere - The layer of gases surrounding the Earth, composed primarily of nitrogen, oxygen, carbon dioxide, and other trace gases.

The stratosphere is a specific layer within the atmosphere, above the troposphere and below the mesosphere. It is not considered one of the major domains of the Earth.

• The strait between India and Sri Lanka is known as the Palk Strait.
• It separates the Indian state of Tamil Nadu from the northernmost point of Sri Lanka.
• It is named after a British officer, Captain H.R. Palk, who surveyed the area in the early 19th century.
  

• By area, Asia is the largest continent in size at 44,391,162 square km.
• It is also the largest by population with more than 4 billion people.

The solid part of the earth where we live is called the Lithosphere. It includes rocks of the earth's crust and a thin layer of soil. So, the correct answer is Option A, Lithosphere. The Lithosphere is like the hard shell of the earth where we stand and build our homes.

The gaseous layers that surround the earth, where oxygen, nitrogen, carbon dioxide, and other gases are found, is called the Atmosphere. It's like a big blanket of air covering the earth to protect all living things.

The Pacific Ocean is the largest ocean, which means it is the biggest one among all the oceans on Earth.

• The atmosphere is not made up of only two gases. While nitrogen and oxygen are the main gases in the atmosphere, there are other gases like carbon dioxide, argon, and others that make up a small part of the atmosphere. These gases, though in smaller amounts, play important roles in maintaining the balance of our planet's atmosphere.