All questions of Major Domains of the Earth for Class 6 Exam

There are five oceans and you can remember their names by PAISA...
P- Pacific Ocean
A- Atlantic ocean
I - Indian Ocean
S - southern ocean
A- Arctic ocean..

Nitrogen is the most prevalent gas, making up nearly 78 percent of the Earth’s atmosphere, which amounts to 4,000 trillion tons. Nitrogen comes from sources such as decaying matter and human fertilizers added to the ground. Interestingly enough, despite it being the most prevalent gas in the atmosphere, most organisms cannot utilize nitrogen in its atmospheric state. Therefore, living organisms that require nitrogen for protein synthesis must consume nitrogen through other means.

option (c) is correct
It is much smaller than Asia. The continent lies to the West of the Asia. It is bound by water bodies on three sides. It is surrounded on all sides by Oceans and Seas.

The Isthmus of Panama (Spanish: Istmo de Panama), also historically known as the Isthmus of Darien (Istmo de Darien), is the narrow strip of land that lies between the Caribbean Sea and the Pacific Ocean, linking North and South America. It contains the country of Panama and the Panama Canal.

Human beings live on earth. It provides them with all the necessities of life other than some such as sunlight. Human beings live only on earth. We call the place where we live as our "HOME." So since we human beings live on earth, we call it our home. Also, we do not go elsewhere in this universe. We do not go to any other planet such as Mars or elsewhere to live. As of now, we haven't even visited them.

The Pacific, Atlantic, and Indian are known as the three major oceans. The Southern Ocean is the 'newest' named ocean. It is recognized by the U.S. Board on Geographic Names as the body of water extending from the coast of Antarctica to the line of latitude at 60 degrees South.

These continents are – Asia, Europe, Africa, North America, South America, Australia and Antarctica. ... Asia is the largest continent. It covers about one- third of the total land area of the earth. The continent lies in the Eastern Hemisphere.

The hydrosphere - this consists of those parts of the earth system composed of water in its liquid, gaseous (vapour) and solid (ice) phases. The hydrosphere includes both saltwater and freshwater systems, and it also includes the moisture found in the soil (soil water) and within rocks (groundwater).

The troposphere is the lowest layer of Earth's atmosphere. Most of the mass (about 75-80%) of the atmosphere is in the troposphere. Most types of clouds are found in the troposphere, and almost all weather occurs within this layer. The troposphere is by far the wettest layer of the atmosphere; all of the layers above contain very little moisture.

The Arctic Circle passes through three continents: Asia, Europe and North America. In addition to Canada, 7 other countries possess territories extending beyond the 66 th Parallel: Norway, Sweden, Finland, Russia, the United States (Alaska), Denmark (Greenland) and Iceland.

It is bordered on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the southeast by the Caribbean Sea, and on the south and west by the North Pacific Ocean; South America lies to the southeast, connected to North America by the isthmus of Panama.

Asia is the largest and most populous continent in the world, sharing borders with Europe and Africa to its West, Oceania to its South, and North America to its East.

North America covers an area of about 24,709,000 square kilometers (9,540,000 square miles), about 16.5% of the earth's land area and about 4.8% of its total surface. North America is the third largest continent by area, following Asia and Africa, and the fourth by population after Asia, Africa, and Europe.

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.

The equator passes through S. America, Asia and Africa. The three of them technically lie on both sides of the equator. Although, Africa is almost divided into two meredional halves by the equator, ensuring that a large area of Africa would lie in the tropics.

Explanation:

India is a country located in South Asia and is surrounded by water bodies on three sides - the Arabian Sea to the west, the Bay of Bengal to the east, and the Indian Ocean to the south. On the north, it shares its land border with several countries including Pakistan, China, Nepal, Bhutan, Bangladesh, and Myanmar.

Peninsula:
A peninsula is a landmass that is surrounded by water on three sides and connected to a larger landmass on the fourth side. India fits this definition as it is surrounded by water bodies on three sides (the Arabian Sea, the Bay of Bengal, and the Indian Ocean) and is connected to the larger landmass of Asia on the north.

Continent:
A continent is a large, continuous mass of land that is not completely surrounded by water. India is not a continent because it is not a large enough landmass to be considered a continent on its own. It is part of the larger continent of Asia.

Sub-continent:
A sub-continent is a large, distinct landmass that is smaller than a continent but larger than a single country. India is often referred to as a sub-continent because of its size, diverse geography, and population. It is the seventh-largest country in the world by land area and the second-most populous country.

Island:
An island is a landmass that is completely surrounded by water. India is not an island because it shares its land border with several countries and is connected to the larger landmass of Asia.

Conclusion:
Based on the description provided, India is best described as a peninsula. It is surrounded by water bodies on three sides (the Arabian Sea, the Bay of Bengal, and the Indian Ocean) and is connected to the larger landmass of Asia on the north.

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.

Understanding Continents
When discussing the sizes of continents, it is essential to know their areas and rankings. The continents are ranked by their total land area, which directly influences their size classification.

Continent Size Rankings
- **1st: Asia** - Asia is the largest continent, covering approximately 44.58 million square kilometers.
- **2nd: Africa** - Africa is the second largest, with an area of about 30.37 million square kilometers.
- **3rd: North America** - North America ranks third, covering around 24.71 million square kilometers.
- **4th: South America** - South America comes next, with an area of approximately 17.84 million square kilometers.

Why Africa is the Second Largest
- **Geographical Diversity**: Africa is known for its vast deserts, rainforests, savannas, and mountain ranges, contributing to its large area.
- **Rich Biodiversity**: The continent is home to numerous ecosystems and wildlife, showcasing its extensive land coverage.
- **Cultural and Historical Significance**: Africa's size also plays a role in its diverse cultures, languages, and histories.

Conclusion
In summary, Africa is indeed the second largest continent after Asia, making it a significant landmass in terms of both size and diversity. Understanding these rankings helps in appreciating the geographical composition of our planet.

The mountain range that separates Europe from Asia is the Urals.

Explanation:

The Urals are a mountain range that stretches over 2,500 kilometers from the Arctic Ocean to the Ural River in Russia. They are considered to be the boundary between Europe and Asia. Here's why:

1. Location:
The Urals are located in Russia and extend from the north to the south. They divide the European and Asian continents. On the eastern side of the Urals lies Siberia, which is part of Asia, while on the western side lies the European part of Russia.

2. Historical Significance:
The Urals have been traditionally recognized as the border between Europe and Asia due to their geographical location. This division dates back to the 18th century when the Russian Empire expanded its territories towards the east.

3. Cultural and Political Differences:
Europe and Asia have distinct cultural and political differences. The Urals act as a natural barrier that separates these two regions, contributing to the differentiation in history, language, religion, and governance.

4. Geographical Features:
The Urals have unique geological and geographical features that make them a significant landmark. They consist of low-lying mountains, plateaus, and plains, providing a clear distinction between the European and Asian landscapes.

5. Symbolic Importance:
The Urals have gained symbolic importance as the boundary between Europe and Asia. They represent a physical and symbolic division between two continents with different cultural, economic, and political characteristics.

In conclusion, the Urals mountain range acts as the natural boundary separating Europe from Asia. Its geographical location, historical significance, cultural differences, and unique features make it the accepted dividing line between these two continents.

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.

The Great Dividing Range is located on the continent of Australia. It is one of the most significant mountain ranges in Australia and stretches approximately 3,500 kilometers (2,175 miles) from the northeast tip of Queensland to the southeastern coast of Victoria.

Key Points:
- The Great Dividing Range is located on the continent of Australia.
- It stretches approximately 3,500 kilometers (2,175 miles) from Queensland to Victoria.

Location:
The Great Dividing Range runs parallel to the eastern coastline of Australia, separating the coastal plains from the inland regions. It extends through multiple Australian states, including Queensland, New South Wales, and Victoria.

Significance:
The range plays a vital role in shaping the geography and climate of the eastern part of Australia. It acts as a natural barrier, preventing the movement of air masses from the east to the west. This results in distinct climatic differences between the coastal areas and the inland regions.

Variety of Landscapes:
The Great Dividing Range encompasses a diverse range of landscapes, including rugged mountains, deep valleys, plateaus, and escarpments. It is home to numerous national parks and protected areas that showcase the unique flora and fauna of Australia.

Highest Peaks:
The range features several notable peaks, with Mount Kosciuszko being the highest at 2,228 meters (7,310 feet) above sea level. Mount Kosciuszko is located in the Snowy Mountains of New South Wales and is a popular destination for hikers and outdoor enthusiasts.

Role in Water Catchment:
The Great Dividing Range acts as a significant water catchment area, with numerous rivers and streams originating from its slopes. These waterways provide important freshwater resources for both human consumption and agricultural activities.

Conclusion:
In conclusion, the Great Dividing Range is a prominent mountain range located on the continent of Australia. It stretches from Queensland to Victoria, acting as a barrier between the coastal areas and the inland regions. With its diverse landscapes, high peaks, and role in water catchment, the Great Dividing Range holds great geographical and ecological significance in Australia.

Ural Mountains, which form the boundary between Europe and Asia. Caucasus Mountains, which also separate Europe and Asia, and are the namesake of the Caucasian race. Carpathian Mountains, a major mountain range in Central and Southern Europe.

Understanding the Southern Ocean
The Southern Ocean, also known as the Antarctic Ocean, is the ocean that encircles the continent of Antarctica. It is distinct from the other oceans due to its unique characteristics and its specific role in the global climate system.

Geographical Location
- The Southern Ocean is located south of 60 degrees South latitude.
- It surrounds the entire continent of Antarctica, forming a natural boundary.

Distinctive Features
- It is characterized by the **Antarctic Circumpolar Current**, which flows from west to east around Antarctica and plays a key role in regulating the Earth's climate.
- The Southern Ocean is colder and less saline compared to other oceans, making it a unique habitat for various marine species.

Importance of the Southern Ocean
- The Southern Ocean is crucial for global ocean circulation and is a significant source of upwelling nutrients, supporting rich marine life.
- It plays a vital role in absorbing carbon dioxide from the atmosphere, helping to mitigate climate change.

Conclusion
In summary, the Southern Ocean encircles Antarctica and is essential for ecological balance and climate regulation. Understanding its significance helps us appreciate the interconnectedness of ocean systems and their impact on our planet.