what are the four main realms of the earth ??
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Answer:
the four main realmes of Earth
Explanation:
four realms of earth : lithosphere , hydrosphere , biosphere and atmosphere. lithosphere : the outer most solid layer of the earth that is composed of rocks and soil is known as lithosphere.it is also called the crust of the earth.
Answer:
The Four Domains of the Earth
☆Lithosphere:
- The solid portion of the earth
☆Atmosphere:
- The gaseous layers that surround the earth
☆Hydrosphere:
- Water covers a very big area of the earth’s surface and this area is called the Hydrosphere
☆Biosphere:
- It is the narrow zone where land, water and air together are found.
Explanation:
LET'S EXPLORE MORE
✯Atmosphere
“Atmosphere is a protective layer of gases that shelters all life on Earth, keeping temperatures within a relatively small range and blocking out harmful rays of sunlight.”
✯Layers of Atmosphere
- Exosphere
- Thermosphere
- Mesosphere,
- Stratosphere
- Troposphere.
☆Troposphere
The troposphere is the lowest layer in the atmosphere. It extends upward to about 10kms above sea level starting from ground level. The lowest part of the troposphere is called the boundary layer and the topmost layer is called the tropopause.
☆Mesosphere
Above the stratosphere is the mesosphere and it extends to a height of about 85 km (53 miles) from the ground.
☆Thermosphere
Thermosphere lies above the mesosphere and this is a region where the temperature increases as you go higher up. The temperature increase is caused due to the absorption of energetic ultraviolet and X-Ray radiation from the sun.
☆Exosphere
Exosphere is the final frontier of the Earth’s gaseous envelope. The air in the exosphere is constantly but gradually leaking out of the Earth’s atmosphere into outer space.
☆Ionosphere
The ionosphere isn’t a distinct layer unlike other layers in the atmosphere. The ionosphere is a series of regions in parts of the mesosphere and thermosphere where high-energy radiation from the Sun has knocked electrons loose from their parent atoms and molecules
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✯What is Hydrosphere?
The hydrosphere is the combined mass of water found on, under, and above the surface of the earth. It has been estimated that there are 1386 million cubic kilometres of water on earth. This includes water in liquid and frozen forms in groundwater, oceans, lakes and streams approximately 75% of Earth’s surface, an area of some 361 million square kilometres is covered by ocean.
✯Hydrological cycle
The hydrological cycle transfers water from one state or reservoir to another. Reservoirs include atmospheric moisture including snow, rain and clouds, streams, oceans, rivers lakes, groundwater, subterranean aquifers, polar icecaps and saturated soil.
The Solar energy is the source of heat and light and gravity causes the transfer from one state to another over periods from hours to thousands of years. Most evaporation comes from the oceans and is returned to the earth as snow or rain.
✯Importance of Hydrosphere
It consists of all bodies of water, icebergs and water vapour in the earth’s atmosphere. Oceans contain 97 per cent of water in the hydrosphere, while rivers, lakes and other water bodies on land and underground water contains a small percentage of total water in the hydrosphere.
- Helps to maintain the hydrological cycle.
- Good means of transport of water
- Plays a vital role in the earth’s climate.
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✯What is Lithosphere?
The lithosphere is the rigid, outermost shell on Earth. It is composed of the crust and the portion of the upper mantle that behaves elastically on time scales of thousands of years or greater. The outermost shell of a rocky planet, the crust, is defined on the basis of its chemistry and mineralogy.
✯Types of Lithosphere
☆Oceanic:
huge water bodies.
Mariana Trench is the deepest Oceanic trench on Earth. The deepest portion is at 11,034 metres. Mariana Trench is located in the Pacific Ocean. Mariana Trench is 69 km in width and 2550 km in length. Mariana Trench derives its name from the nearby Mariana Islands which is located at around 200 km from the Mariana Trench in the Pacific Ocean.
- the Pacific Ocean
- the Atlantic Ocean
- the Indian Ocean
- the Southern Ocean
- the Arctic Ocean:
☆Continental:
the large landmasses.
The Highest Mountain Peak on this earth is the Mount Everest. The current official elevation is 8,848 metres above sea level. The elevation was measured and established by an Indian survey conducted in 1955. The border between Nepal and China runs across its summit points.
- Asia
- Africa
- Europe
- North America
- South America
- Australia
- Antarctica
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✯Biosphere
It is the narrow zone where land, water and air together are found.