Assertion and Reason: Major Domains of the Earth | Class 6: Additional Practice PDF Download

Q1: Assertion(A): The surface of the Earth is a complex zone in which three main components of the environment meet, overlap and interact.
Reason(R): The biosphere is the narrow zone where we find land, water and air together.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (b)
Both the assertion and the reason are correct. The Earth's surface is indeed a complex zone where the lithosphere (solid portion), hydrosphere (water bodies), and atmosphere (gaseous envelope) meet and interact. The biosphere, which includes all living organisms, is a part of this complex interaction zone, and it is true that it encompasses areas where land, water, and air come together.

Q2: Assertion(A): The solid portion of the earth is called lithosphere.
Reason(R): It comprises the rocks of the Earth’s crust and the thin layers of soil that contain nutrient elements which sustain organisms.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (a)
Both the assertion and the reason are correct, and the reason explains the assertion. The lithosphere is indeed the solid outermost shell of the Earth, composed of the Earth's crust and a portion of the upper mantle. It contains rocks, minerals, and soil, which play a crucial role in sustaining various forms of life by providing essential nutrients.

Q3: Assertion(A): The level of seawater varies from place to place.
Reason(R): Elevation of land is measured from the level of the sea, which is taken as zero.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (d)
The assertion statement is correct. The level of seawater does vary from place to place due to factors like tides, currents, and oceanographic features. However, the reason statement is not accurate. Elevation of land is measured from a reference point called sea level, which is not taken as zero but rather as a baseline for measuring heights and depths.

Q4: Assertion(A): Asia is the largest continent.
Reason(R): It covers about 1/4th of the total land area of the Earth.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (c)
The assertion statement is correct. Asia is indeed the largest continent in terms of both area and population. However, the reason statement is not correct. Asia covers more than 1/4th of the Earth's land area; it covers about 1/3rd of the total land area.

Q5: Assertion(A): Europe lies to the north of Asia.
Reason(R): The Arctic Circle passes through Europe. It is bound by water bodies on three sides.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (d)
The assertion statement is not correct. Europe does not lie directly to the north of Asia; rather, it lies to the west. The reason statement is correct. The Arctic Circle does indeed pass through Europe, and Europe is surrounded by water bodies on three sides: the Atlantic Ocean to the west, the Mediterranean Sea to the south, and the Arctic Ocean to the north.

Q6: Assertion(A): The Sahara Desert, the world’s largest hot desert, is located in Africa.
Reason(R): The continent of Africa is bound on all sides by ocean and seas. The River Nile flows through Africa.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (b)
Both the assertion and reason statements are true. The Sahara Desert is indeed located in Africa, and Africa is not surrounded on all sides by oceans and seas; it is bordered by the Mediterranean Sea to the north. The River Nile does flow through Africa. However, the reason statement does not directly explain why the Sahara Desert is located in Africa.

Q7: Assertion(A): North America lies completely in the northern and Western Hemisphere.
Reason(R): Three oceans surround this continent - Pacific, Atlantic and Antarctic.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (c)
The assertion statement is correct. North America does lie entirely within the northern and western hemispheres. However, the reason statement is not accurate. North America is not surrounded by the "Antarctic" Ocean. It is surrounded by the Pacific Ocean to the west, the Atlantic Ocean to the east, and the Arctic Ocean to the north.

Q8: Assertion(A): South America is surrounded by the Pacific Ocean and Atlantic Ocean.
Reason(R): South America has the world’s largest river, the Amazon, in Chile.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (c)
The assertion statement is correct. South America is indeed surrounded by the Pacific Ocean to the west and the Atlantic Ocean to the east. However, the reason statement is not accurate. The Amazon River is not located in Chile; it flows through multiple countries, primarily Brazil and Peru.

Q9: Assertion(A): A Strait is a narrow passage of water connecting to large water bodies like seas and oceans.
Reason(R): Palk Strait separates India and Sri Lanka.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (b)
Both the assertion and reason statements are true. A strait is indeed a narrow passage of water connecting two larger bodies of water, and the Palk Strait does separate India and Sri Lanka. However, while the reason statement provides an accurate example of a strait, it doesn't explain the general concept of a strait connecting large water bodies.

Q10: Assertion(A): Oceans are the major part of the hydrosphere.
Reason(R): The three chief movements of ocean waters are the waves, the tides and the ocean currents.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (b)
Both the assertion and reason statements are true. Oceans do indeed constitute the major part of the hydrosphere, and the three chief movements of ocean waters are waves, tides, and ocean currents. However, the reason statement doesn't directly explain why oceans are the major part of the hydrosphere.

Q11: Assertion(A): Water covers a very big area of the earth surface.
Reason(R): The hydrosphere comprises water in all its forms. That is, ice, water and water vapour.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (b)
Both the assertion and reason statements are true. Water indeed covers a significant portion of the Earth's surface, primarily in the form of oceans, seas, lakes, and rivers. The hydrosphere does include water in all its forms, including ice, water, and water vapor. However, the reason statement doesn't directly explain why water covers a very big area of the Earth's surface.

Q12: Assertion(A): There are two main divisions of the earth surface.
Reasons(R): The large land masses are known as countries and the huge water bodies are called the ocean basins.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (c)
The assertion statement is not accurate. The Earth's surface is typically divided into several continents and oceans, not just two main divisions. The reason statement is also not accurate. Large land masses are not referred to as "countries"; countries are political entities. Similarly, huge water bodies are not referred to as "ocean basins"; ocean basins are geologic features.

Q13: Assertion(A): There are seven major continents.
Reason(R): These continents are separated by large water bodies. These continents are Asia, Europe, Africa, North Africa, South America, Australia and Antarctica.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (c)
The assertion statement is correct. There are indeed seven major continents on Earth. However, the reason statement is not accurate. "North Africa" is not considered a separate continent; it is part of the continent of Africa. Additionally, the reason statement incorrectly lists "North Africa" as a separate entity.

Q14: Assertion(A): Asia is separated from Europe by the Ural Mountains on the east.
Reason(R): The continent Asia lies in the eastern hemisphere. The Tropic of Cancer passes through this continent.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (d)
The assertion statement is not accurate. Asia is separated from Europe by the Ural Mountains on the west, not the east. The reason statement is correct. The continent of Asia does lie primarily in the eastern hemisphere, and the Tropic of Cancer does pass through parts of Asia.

Q15: Assertion(A): Africa is the second largest continent after Asia.
Reason(R): The equator or the zero degree latitude runs almost through the North End of the continent.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (c)
The assertion statement is accurate. Africa is indeed the second largest continent after Asia. However, the reason statement is not accurate. The equator does not run through the "North End" of the continent; it passes near the center of the continent.

Q16: Assertion(A): North America is the 4th largest continent of the world.
Reason(R): It is linked to South America by a very narrow strip of land called the Isthmus of Panama.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (c)
The assertion statement is accurate. North America is indeed the fourth largest continent in terms of area. However, the reason statement is not accurate. While North America is linked to South America by the Isthmus of Panama, this fact doesn't directly explain why North America is the fourth largest continent.

Q17: Assertion(A): South America lies mostly in the northern hemisphere.
Reason(R): The Andes, the world’s longest mountain range, runs through its length from north to South.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (d)
The assertion statement is not accurate. South America lies mostly in the southern hemisphere. The reason statement is correct. The Andes is indeed the world's longest mountain range, and it runs through South America from north to south.

Q18: Assertion(A): Australia is the smallest continent that lies entirely in the southern hemisphere.
Reason(R): Australia is also known as the island continent.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (b)
Both the assertion and reason statements are true. Australia is indeed the smallest continent that lies entirely in the southern hemisphere, and it is often referred to as the island continent due to its unique geographical features. However, the reason statement doesn't directly explain why Australia is the smallest continent in the southern hemisphere.

Q19: Assertion(A): More than 71% of the Earth is covered with water and 29 percent with land.
Reason(R): A large proportion of the water is in the form of ice sheets and glaciers or under the ground, and a very small percentage is available as freshwater for human beings.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (b)
Both the assertion and reason statements are true. More than 71% of the Earth's surface is covered with water, and about 29% is covered by land. The reason statement correctly explains that a significant portion of the Earth's water is in the form of ice sheets, glaciers, or underground, and only a small percentage is readily available as freshwater for human use.

Q20: Assertion(A): The atmosphere extends up to a height of about 1600 kilometres.
Reason(R): The atmosphere is divided into five layers based on composition, temperature and other properties.
(a) Both A and R are true and R is the correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true
Ans: (b)
Both the assertion and reason statements are true. The atmosphere indeed extends to an approximate height of about 1600 kilometers above the Earth's surface. The reason statement is also accurate, as the atmosphere is divided into several layers based on various properties such as composition, temperature, and pressure. However, the reason statement doesn't directly explain why the atmosphere extends to a height of about 1600 kilometers.