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Why is the Earth called a unique planet?

Last Updated : 16 Jun, 2023
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Earth, which is third from the Sun is known to support life. Although the Solar System contains enormous amounts of water, only Earth is home to liquid surface water. Earth is known as a unique planet as it has conditions that are favorable for supporting life which is found only on Earth, the earth is neither too hot nor too cold and there is the presence of air and water on it, which is very important for the survival of species.

Earth is Unique Planet

Earth is Unique Planet

Over 4.5 billion years ago, Earth was formed. The ocean was created throughout the first billion years of Earth’s existence, and then life began to flourish there. Earth’s Great Oxidation Event occurred two billion years ago as a result of the global spread of life and its subsequent impact on the planet’s surface and atmosphere. Humans first appeared on Earth 300,000 years ago, and although they depend on the biosphere and other natural resources for survival, they have had an increasingly negative impact on the environment. The current state of the Earth’s temperature, soils, seas, and ecosystems is unsustainable, endangering human life and widely triggering the extinction of other forms of life.

Why Earth is Called a Unique Planet?

The fifth-largest planet in our solar system is Earth. The earth’s circumference is 3959 miles. Only 29% of the earth’s surface, is made up of continents and islands, island, with around 71% of the planet’s surface being covered in water.

There are a lot of reasons why the Earth is a special planet. The only planet in our solar system where all the necessary conditions for life to exist are present is Earth. The earth’s climate is just right—not too hot or too cold. There is air and water on our planet. The two elements that are most crucial to our survival are water and air. One of the most alluring features of the earth is the presence of water. In our solar system, only our planet, Earth, is home to liquid water.

Earth’s distance from the sun allows for this since a planet that is too close to the sun would experience excessive heat from it, while a planet that is too far away would experience extreme cold. Our world would surely be geologically dead if water were not present in it. The only planet in the solar system that is known to harbor life is Earth. There is water, oxygen, and temperature on Earth. Our planet’s air, water, and temperature are in the right quantities to support life.

The availability of water and air in a healthy ratio, the presence of gases that support life, and a stable temperature all contribute to making Earth a special planet.

Layers of Earth

Earth has four distinct strata. The majority of geologists think that when the Earth cooled, the denser, heavier material sank to the centre while the lighter material rose to the surface. Because of this, the innermost layer is composed of nickel and iron, and the outermost layer is formed of the lightest materials, such as rocks, and granite. Let’s talk about the various levels of the earth.

Inner Core

The Earth’s core is where its hottest layer is located. Iron and nickel make up the solid inner core. The inner core is more like the Earth’s engine room because of its enormous heat energy.

The Outer Core

The Earth’s outer core resembles a metal ball that is extremely heated. The metals inside are all liquid because it is so hot. Around 1800 miles below the crust’s surface, the outer core is around 1400 miles thick. It is made of metals like nickel and iron. The inner core is encircled by the outer core. The pressures and temperatures inside the inner core are so intense that the metals cannot move like liquids but are instead forced to vibrate.


The largest portion of the Earth is its mantle. It measures over 2,900 kilometres thick. Magma, a type of semi-molten rock, makes up the majority of the mantle. Lower in the mantle, the rock is softer and starts to melt. Up top, the rock is firm. The Siam is directly beneath the mantle. Rock that is extremely heated and thick makes up the mantle. Under pressure, this layer of rock flows like asphalt. The biggest temperature variations between the mantle’s bottom and top are what create this flow. The shifting of the mantle is what causes the Earth’s plates to move.


Where we live, the crust is the topmost layer. The thickness ranges from 0 to 60 kilometres. There are two different types of this solid rock layer:

  1. Continental crust covers the land
  2. The oceanic crust covers the water

Related Links

  1. Interior of the earth
  2. Composition of Earth’s atmosphere
  3. Four realms of earth
  4. Major Landforms of Earth

Frequently Asked Questions

Q 1. Why is the Earth called a unique planet?


Earth is termed as a unique planet because of the favorable conditions of life support which is present on Earth. It is neither too cold nor too hot.

Q 2. What are the three reasons that Earth is unique?


The three reasons why the earth is known as unique include the feature of it sustaining life, its distance from the sun, and the availability of water on the surface.

Q 3. Why the earth is known as a unique and blue planet?


Earth is known as unique and blue planet as it is covered with water and therefore the outer space of it appears to be blue and hence it is known as “blue planet”.

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