This PSEB 6th Class Social Science Notes Chapter 5 Realms of the Earth will help you in revision during exams.
PSEB 6th Class Social Science Notes Chapter 5 Realms of the Earth
→ Realms of the Earth: Land, water, and air are the three realms of the earth.
→ Lithosphere: Lithosphere is the realm of the earth which consists of solid crust, i.e. rocks.
→ Hydrosphere: Hydrosphere means the realm of the earth containing the water of the earth collectively.
→ Atmosphere: The realm of the air surrounding the earth is known as the atmosphere.
→ Biosphere: The narrow contact zone of land, water, and air that contains all forms of life is called the biosphere.
→ Continent: A continent is a large area of contiguous land rising above sea level.
→ Ocean: An ocean is a vast body of water on the surface of the earth, which surrounds the land.
→ Mountain: A mountain is a landmass considerably higher than the surrounding area.
→ Plateau: A plateau is a broad and rather level stretch of land rising sharply above the neighbouring lowland.
→ Plain: A relatively flat and low-lying land surface is called a plain.
→ Gases of Air: Nitrogen, oxygen, and carbon- dioxide are the main gases of air.
→ The largest ocean in the world: The Pacific Ocean is the largest ocean in the world. It is also deeper than any other ocean.
→ It is bounded by Asia and Australia on the one hand and North America and South America on the other.
→ About 70% of the earth’s surface is covered by water.
→ About 29% of the earth’s surface is covered by land.
→ The lithosphere consists of mountains, plateaus, and plains.
→ There are seven continents namely Asia, Africa, North America, South America, Europe, Antarctica, and Australia.
→ There are four oceans namely Pacific, Atlantic, Indian, and the Arctic.
→ The atmosphere is a mixture of gases.
→ Nitrogen (78%) is the biggest constituent of the Atmosphere.
→ The biosphere is the realm of living things.
→ The hydrosphere is the realm of water.
→ The lithosphere is the realm of solid crust.
→ Earth: A unique planet
→ Litho: Means store.
→ Mt Everest: 8848 metres high
→ Table Land: A Plateau
→ White Continent: Antarctica
→ Mariana Trench: The deepest trench
→ Life breath: Oxygen
→ Harmful Gases: Carbon dioxide, Carbon monoxide.