Olympiad Test Level 1: World Geography- 1 - Class 7 MCQ

Answer:
The ancient name 'Oxus' refers to the Amu Darya river. Here is a detailed explanation:
Introduction:
The question asks for the ancient name of a river. In this case, the ancient name 'Oxus' refers to a specific river.
Explanation:
The ancient name 'Oxus' corresponds to the Amu Darya river. Here is the explanation for each option:
A: Tigris - The Tigris river is not the correct answer. It is a major river in the Middle East, but its ancient name is not 'Oxus'.
B: Euphrates - The Euphrates river is also not the correct answer. Like the Tigris, it is a major river in the Middle East, but its ancient name is not 'Oxus'.
C: Amu Darya - The Amu Darya river is the correct answer. It is a major river in Central Asia, and its ancient name is 'Oxus'. The Amu Darya flows through several countries, including Tajikistan, Afghanistan, and Turkmenistan.
D: Syr Darya - The Syr Darya river is not the correct answer either. It is another major river in Central Asia, but its ancient name is not 'Oxus'.
Conclusion:
In conclusion, the ancient name 'Oxus' refers to the Amu Darya river.

To determine the correct answer, let's analyze the options given:
A: Plain
- A plain refers to a flat or gently rolling area of land, typically at a low elevation. However, it is not necessarily lower in elevation or less steep than a mountain.
B: Valley
- A valley is a low-lying area between mountains or hills. It is generally lower in elevation and less steep than a mountain, making it a possible answer.
C: Hill
- A hill is an elevated area of land that is lower in elevation and less steep than a mountain. Therefore, it fits the description provided and can be considered the correct answer.
D: Plateau
- A plateau is a flat-topped elevated area of land, typically at a higher elevation than a plain or valley. It is not lower in elevation than a mountain, so it is not the correct answer.
Therefore, the correct answer is C: Hill.

Explanation:
To determine the world's most populated region, we need to consider the population density and total population of each region.
Population Density:
Population density refers to the number of individuals per unit of area. The higher the population density, the more populated a region is.
Total Population:
Total population refers to the overall number of individuals living in a specific region.
Comparison of Regions:
A: North American Plain
- The population density of North American Plain is relatively low compared to other regions.
- The total population of North American Plain is not as high as other regions.
B: Australian Plain
- The population density of Australian Plain is low due to its vast land area and relatively small population.
- The total population of Australian Plain is not as high as other regions.
C: Eurasia Plain
- The population density of Eurasia Plain is relatively high due to its large land area and significant population.
- The total population of Eurasia Plain is high due to the presence of densely populated countries like China and India.
D: Indo-Gangetic Plain
- The population density of Indo-Gangetic Plain is extremely high due to its fertile land and dense population settlements.
- The total population of Indo-Gangetic Plain is the highest among the given options due to the presence of densely populated regions in India and Bangladesh.
Conclusion:
Considering the population density and total population, the Indo-Gangetic Plain (Option D) is the world's most populated region. It has a high population density and the highest total population among the given options.

The deepest lake in the world is Lake Baikal.
Some key points about Lake Baikal include:
- Location: Lake Baikal is located in southern Siberia, Russia.
- Depth: It is the deepest lake in the world, with a maximum depth of 1,642 meters (5,387 feet).
- Age: Lake Baikal is estimated to be around 25 million years old, making it one of the oldest lakes on Earth.
- Size: It is also one of the largest freshwater lakes by volume, containing about 22% of the world's fresh surface water.
- Biodiversity: Lake Baikal is known for its exceptional biodiversity, with over 1,700 species of plants and animals, two-thirds of which can be found nowhere else in the world.
- Geological Significance: It is considered a UNESCO World Heritage Site and is recognized as an important geological and biological research area.
- Recreation: The lake is a popular tourist destination, offering various recreational activities such as boating, fishing, and hiking.
Overall, Lake Baikal's impressive depth, age, size, biodiversity, and geological significance make it a unique and fascinating natural wonder.

Answer:
To determine which of the following mountains are not Fold-Mountains, we need to understand the characteristics of Fold-Mountains and evaluate each option accordingly.
Characteristics of Fold-Mountains:
1. Formed by the folding of rock layers due to tectonic forces.
2. Typically have parallel ridges and valleys.
3. Often found at the boundaries of tectonic plates.
Now let's evaluate each option:
A: Cantabrian Mountains
- These mountains are located in northern Spain.
- They were formed through a combination of tectonic plate movement and erosion.
- They are considered Fold-Mountains.
B: Pyrenees Mountains
- These mountains form a natural border between Spain and France.
- They were formed by the collision of the Eurasian and Iberian tectonic plates.
- They are considered Fold-Mountains.
C: Alps Mountains
- The Alps are a major mountain range in Europe, spanning several countries.
- They were formed through the collision of the African and Eurasian tectonic plates.
- They are considered Fold-Mountains.
D: Black Forest Mountain
- The Black Forest is a mountain range located in southwestern Germany.
- These mountains are not formed by folding of rock layers; instead, they are primarily composed of granite and gneiss.
- They are not considered Fold-Mountains.
Therefore, the correct answer is D: Black Forest Mountain, as it is not a Fold-Mountain.

North Side of Atlantic Ocean
The north side of the Atlantic Ocean is connected to the following bodies of water:
- Arctic Ocean: The northernmost part of the Atlantic Ocean is connected to the Arctic Ocean.
- Pacific Ocean: While the Atlantic Ocean and Pacific Ocean are separate bodies of water, they are connected through various waterways, such as the Panama Canal and the Strait of Magellan.
- Mexican canal: There is no direct connection between the north side of the Atlantic Ocean and a "Mexican canal." It is possible that this option is referring to the Gulf of Mexico, which is connected to the Atlantic Ocean through the Florida Straits.
- Panama canal: The Panama Canal is a man-made waterway that connects the Atlantic Ocean to the Pacific Ocean. It is located in the country of Panama and allows ships to bypass the longer route around Cape Horn at the southern tip of South America.
Therefore, the correct answer is option A: Arctic Ocean.

Explanation:
The Pacific Ocean is the largest and deepest ocean in the world, covering an area of approximately 63 million square miles. It separates Australia and Asia from North and South America. Here is a detailed explanation of the options:
A. South America and Europe:
- The Pacific Ocean does not separate South America and Europe. The Atlantic Ocean separates these two continents.
B. European countries:
- The Pacific Ocean does not separate European countries. It is located on the opposite side of the globe from Europe.
C. African countries:
- The Pacific Ocean does not separate African countries. The Atlantic Ocean separates Africa from the Americas.
D. North and South America:
- This is the correct answer. The Pacific Ocean separates North and South America from Australia and Asia.
In conclusion, the correct answer is option D. The Pacific Ocean separates Australia and Asia from North and South America.

The largest desert in the world is the Sahara desert. Here is a detailed explanation:
Definition of a desert:
- A desert is a barren area of land where little precipitation occurs and consequently living conditions are hostile for plant and animal life.
Characteristics of the Sahara desert:
- The Sahara desert is located in North Africa and covers an area of approximately 9.2 million square kilometers.
- It is the largest hot desert in the world.
- The Sahara desert stretches across several countries including Algeria, Chad, Egypt, Libya, Mali, Mauritania, Morocco, Niger, Sudan, and Tunisia.
- It is known for its vast stretches of sand dunes, rocky plateaus, and barren landscapes.
- The temperatures in the Sahara desert can reach extreme highs during the day and drop significantly at night.
- The Sahara desert receives very little rainfall, making it a true desert.
Comparison with other deserts:
- The Kalahari desert, located in southern Africa, is a semi-arid desert and is not as large as the Sahara desert.
- The Gibson desert, located in Western Australia, is also smaller in size compared to the Sahara desert.
- The Gobi desert, located in East Asia, is the largest desert in Asia but is still smaller than the Sahara desert.
Conclusion:
- Therefore, based on its size and characteristics, the Sahara desert is recognized as the largest desert in the world.

Strait Known as the "Key to the Mediterranean": Gibraltar Strait

The strait known as the "Key to the Mediterranean" is the Gibraltar Strait.

Explanation:

• The Gibraltar Strait is a narrow waterway that connects the Atlantic Ocean to the Mediterranean Sea.


• It is located between the southernmost tip of the Iberian Peninsula (Spain) and the northernmost tip of Africa (Morocco).


• This strait serves as a crucial shipping route between the Mediterranean Sea and the rest of the world.


• Its strategic location has made it historically significant, as it controls access to and from the Mediterranean region.


• The strait is only about 14 kilometers (8.7 miles) wide at its narrowest point, making it a bottleneck for maritime traffic.


• It is also known for the famous landmark, the Rock of Gibraltar, which stands on the northern side of the strait.


• The Gibraltar Strait is an important passage for international trade, with numerous ships passing through it every day.

In conclusion, the "Key to the Mediterranean" is the Gibraltar Strait due to its strategic location and role in controlling access to the Mediterranean Sea.

The yellow stone national park is in the USA.