Test: Major Domains Of The Earth - Class 6 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.

Topic in NCERT: Europe and Asia

Line in NCERT: "The continent lies to the west of Asia. Asia is separated from Europe by the Ural mountains on the west."

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.

Topic in NCERT: ATMOSPHERE

Line in NCERT: "Carbon dioxide (CO2) is an important constituent of air. But increase in the amount of CO2 leads to increase in global temperatures. This is termed as global warming."

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.

Topic in NCERT: Atmosphere

Line in NCERT: "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 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.

Topic in NCERT: ATMOSPHERE

Line in NCERT: "The gaseous layers that surround the earth, is the Atmosphere, where oxygen, nitrogen, carbondioxide and other gases are found."

• 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.
  

Topic in NCERT: STRAIT

Line in NCERT: "Name the Strait between India and Sri Lanka."

• 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.

Topic in NCERT: LITHOSPHERE

Line in NCERT: "The solid portion of the earth is called the Lithosphere."

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.

Topic in NCERT: ATMOSPHERE

Line in NCERT: "The gaseous layers that surround the earth, is the Atmosphere, where oxygen, nitrogen, carbondioxide and other gases are found."

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

Topic in NCERT: Oceans

Line in NCERT: "The Pacific Ocean is the largest ocean."

• 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.

Topic in NCERT: Atmosphere

Line in NCERT: "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 Southern Ocean encircles the continent of Antarctica. It extends northward to 60 degrees south latitude and is the fourth largest ocean in the world.

Topic in NCERT: Southern Ocean

Line in NCERT: "The Southern Ocean encircles the continent of Antarctica and extends northward to 60 degrees south latitude."

The Nile River is the longest river in the world, flowing over 6,650 kilometers through northeastern Africa to drain into the Mediterranean Sea. It has been a vital water source for civilizations throughout history.

Topic in NCERT: AFRICA

Line in NCERT: "You will notice that the world's longest river the Nile,"

The Isthmus of Panama is the narrow strip of land that connects North America to South America. This land bridge plays a crucial role in the migration of species and human travel between the two continents.

Topic in NCERT: NORTH AMERICA

Line in NCERT: "The continent of North America is linked to South America by a very narrow strip of land called the Isthmus of Panama."

Africa is the second largest continent after Asia. It is crossed by the Equator, the Tropic of Cancer, and the Tropic of Capricorn, making it a continent with diverse climates and ecosystems.

Topic in NCERT: Africa

Line in NCERT: "Africa is the second largest continent after Asia."

Mt. Everest, standing at 8,848 meters above sea level, is the highest mountain peak in the world. It is located in the Himalayas on the border between Nepal and the Tibet Autonomous Region of China.

Topic in NCERT: HIGHEST MOUNTAIN PEAK

Line in NCERT: "The highest mountain peak Mt. Everest is 8,848 metres above the sea level."