Class 6 Exam > Class 6 Videos > Social Studies (SST) Class 6 > Major Domains of the Earth : Overview
Major Domains of the Earth : Overview Video Lecture | Social Studies (SST) Class 6
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FAQs on Major Domains of the Earth : Overview Video Lecture - Social Studies (SST) Class 6
| 1. What are the major domains of the Earth? |  |
Ans. The major domains of the Earth are the lithosphere, hydrosphere, atmosphere, and biosphere. The lithosphere refers to the solid outer layer of the Earth, which includes the Earth's crust and a portion of the upper mantle. The hydrosphere includes all the water on Earth, including water in oceans, lakes, rivers, and underground. The atmosphere is the layer of gases that surround the Earth. The biosphere refers to all living organisms on Earth and their interactions with the other domains.
| 2. What is the lithosphere? | |
Ans. The lithosphere is the solid outer layer of the Earth, which includes the Earth's crust and a portion of the upper mantle. It is composed of rocks, minerals, and soil. The lithosphere is divided into several tectonic plates that float on the semi-fluid asthenosphere beneath them. These plates are constantly moving and interacting with each other, leading to various geological phenomena such as earthquakes and volcanic eruptions.
| 3. What is the hydrosphere? | |
Ans. The hydrosphere is the domain of Earth that includes all the water on Earth. It encompasses water in oceans, seas, lakes, rivers, groundwater, and even water vapor in the atmosphere. The hydrosphere plays a crucial role in regulating Earth's climate, as water acts as a heat sink and helps distribute heat around the planet. It also supports various ecosystems and is essential for the survival of all living organisms.
| 4. What is the atmosphere? | |
Ans. The atmosphere is the layer of gases that surrounds the Earth. It is composed mainly of nitrogen (78%) and oxygen (21%), with traces of other gases such as carbon dioxide, water vapor, and argon. The atmosphere acts as a protective blanket, shielding the Earth from harmful solar radiation and regulating the planet's temperature. It also plays a vital role in the water cycle, weather patterns, and the distribution of gases necessary for life.
| 5. What is the biosphere? | |
Ans. The biosphere is the domain of Earth that encompasses all living organisms and their interactions with the other domains. It includes all plants, animals, and microorganisms found on Earth, as well as their habitats. The biosphere is a complex and interconnected web of life, where organisms depend on each other for survival. It spans from the deepest parts of the ocean to the highest mountains and even extends to the atmosphere where some microorganisms can be found.
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