Class 6 Geography Chapter 5 Case Based Questions - Major Domains of the Earth

Case 1: Exploring Continents

A group of geography students is studying the major domains of the Earth. They are particularly interested in continents. Can you answer their questions based on the information provided?

Q1: What is the largest continent on Earth, and where is it located?
Ans: The largest continent is Asia, covering about one-third of the Earth's land area.

Q2: Which continent is the second-largest and lies mostly in the northern hemisphere?
Ans: Africa is the second-largest continent, primarily in the northern hemisphere.

Q3: Name the continent that is entirely surrounded by ocean and is often referred to as the "island continent."
Ans: Australia is the continent entirely surrounded by the ocean, known as the "island continent."

Q4: In which hemisphere does South America primarily exist, and which two oceans surround it?
Ans: South America primarily exists in the southern hemisphere and is surrounded by the Atlantic and Pacific oceans.

Q5: What geographical feature connects North America and South America, and in which hemispheres are they located?
Ans: North America and South America are connected by the Isthmus of Panama, with North America in the northern and western hemispheres.

Case 2: Diving into the Hydrosphere

A curious student is learning about the Earth's hydrosphere and its components. Can you provide answers to their questions based on the information given?

Q6: What percentage of the Earth's surface is covered by water, and how much is land?
Ans: More than 71% of the Earth's surface is covered by water, and 29% is land.

Q7: What is the primary component of the hydrosphere, and where is most of it found?
Ans: The primary component of the hydrosphere is water, with over 97% found in the oceans.

Q8: Why is the ocean water unsuitable for human consumption, and what percentage of Earth's water does it make up?
Ans: Ocean water is too salty for human consumption, making it unsuitable. Oceans hold most of the Earth's water.

Q9: What are the three main movements of ocean water, and how do they affect the Earth's surface?
Ans: The three main movements of ocean water are waves, tides, and ocean currents.

Q10: Can you name all five major oceans and provide a unique characteristic of each?
Ans: The five major oceans are the Pacific, Atlantic, Indian, Arctic, and Southern oceans, each with unique characteristics.

Case 3: Layers of the Atmosphere

A young scientist is fascinated by the Earth's atmosphere and its layers. Help them understand the composition and characteristics of Earth's atmosphere.

Q11: Name the two most abundant gases in Earth's atmosphere and their respective percentages.
Ans: The two most abundant gases in Earth's atmosphere are nitrogen (78%) and oxygen (21%).

Q12: Explain the importance of nitrogen for plants and oxygen for living beings.
Ans: Nitrogen is essential for plant growth, while oxygen is necessary for respiration and burning fuels.

Q13: List the layers of the Earth's atmosphere in order, starting from the bottom.
Ans: The layers of Earth's atmosphere, from bottom to top, are troposphere, stratosphere, mesosphere, thermosphere, and exosphere.

Q14: Why do mountaineers need oxygen cylinders when ascending high mountains, and what role does atmospheric pressure play?
Ans: Mountaineers need oxygen cylinders at high altitudes due to low atmospheric pressure, making it hard to breathe.

Q15: How does air move in relation to atmospheric pressure, and what is this movement called?
Ans: Air moves from high pressure to low pressure, and this movement is called wind.

Case 4: The Biosphere Connection

A biology enthusiast is intrigued by the biosphere and its intricate web of life. Provide answers to their questions based on the information provided.

Q16: What is the biosphere, and what does it encompass?
Ans: The biosphere is the narrow zone where the lithosphere, hydrosphere, and atmosphere intersect and support life.

Q17: How is life distributed in the biosphere, in terms of the size and variety of organisms?
Ans: Organisms in the biosphere vary in size and include microbes, bacteria, and large mammals.

Q18: Explain the interdependence of living organisms within the biosphere and their connection to non-living elements.
Ans: Living organisms in the biosphere depend on each other and non-living elements for survival.

Q19: Name the two broad categories into which organisms in the biosphere are divided.
Ans: The biosphere classifies organisms into the plant kingdom and the animal kingdom.

Q20: What is photosynthesis, and why is it crucial for the biosphere?
Ans: Photosynthesis is the process by which plants make food and is crucial for the biosphere.

Case 5: Earth's Major Domains Recap

A student is preparing for a geography quiz and needs a quick recap of the major domains of the Earth. Summarize the key information for them.

Q21: Name the four major domains of the Earth.
Ans: The four major domains of the Earth are lithosphere, hydrosphere, atmosphere, and biosphere.

Q22: Describe what the lithosphere consists of and mention the thin layer on top of it.
Ans: The lithosphere consists of solid rocks with a thin layer of soil on top.

Q23: Explain what the term "isthmus" means and provide an example of one.
Ans: An isthmus is a narrow strip of land that joins two landmasses, like the Isthmus of Panama.

Q24: What percentage of the Earth's surface is covered by water, and how much is covered by land?
Ans: More than 71% of the Earth's surface is covered by water, and 29% is land.

Q25: List the five major oceans and describe a unique feature or characteristic of each.
Ans: The five major oceans are the Pacific, Atlantic, Indian, Arctic, and Southern oceans, each with its unique characteristics.