Question

why do we say that the planet earth is unique

Answer 1

Hey dear here is your answer!!!!

We say this because earth has water and atmosphere , which sustains life while on other planets no such conditions are there .....

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Answer 2

hey mate
Earth is extremely unique.

Earth has many things going for it, that other planets just don’t have. For one, it has large amounts of liquid water. This might not be too special, as Jupiter’s moon Europa also may have liquid water, but it is not certain. Other than maybe Europa, Earth is the only planet that currently has liquid water (planets like Mars used to have water). Also, Earth has a substantial amount of oxygen that allows it to support life, and it has the perfect amount for fires to burn. If there was too much oxygen, everyone would die of oxygen toxicity, and fires would burn like crazy.

So, Earth has already defied all odds and has liquid water and enough oxygen to support life (but not too much). Lets see what else Earth has to offer…

Earth has a thick atmosphere, which grants protection to Earth’s residents from harmful UV rays from the sun. It also is the perfect density that it doesn’t crush people, but it isn’t too thin so it allows people to breathe. Also, Earth has a powerful magnetic field that protects it from harmful solar wind and solar flares. The reason Mars is such a barren wasteland with a very thin atmosphere is because it doesn’t have a very strong magnetic field; over time, the Sun blew away its atmosphere. The magnetic field on Earth deflects most solar wind and solar flares, but some wind can get through and interact with the particles in the atmosphere. This is what creates Aurora Borealis, or the Northern lights.

Earth also is a good size to support life. If it was much smaller, it would lose its atmosphere like Mars or Mercury. An interesting aside: Earth is in fact quite small for a planet able to support life; slightly larger planets would actually be more likely to be habitable than ones of Earth’s size. That’s why astronomers often look for exoplanets larger than Earth, because they would more likely be able to support life.

Finally, Earth is the perfect distance from the sun. It is located in an area called the Goldilocks Zone, which is the distance from a star where liquid water is able to be sustained. If Earth were farther away, it would be too cold, and all the water would freeze, like the poles on Mars. If Earth were closer, the water would be boiled off.

In conclusion, Earth is unique because against all odds it manages to be the perfect distance from a star, it is a good size, it has a thick atmosphere, a strong magnetic field, an oxygen rich atmosphere, and it has large amounts of liquid water. All these factors combined allow Earth to be the only planet (that we know of) that is able to support complex life.

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Kade Sanderson

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Richard Dreiser, Tour Guide

Answered Apr 9

Originally Answered: Why is the Earth known as a unique planet?

All planets, including dwarf planets, and exoplanets (as well as the moons that are associated with them) are unique. That is, no two are very much alike. Earth is warm enough for water to exist in a liquid state, most of the time, and life can flourish. Earth is sufficiently massy to hold down an atmosphere that protects us from some of the Sun’s harmful ultraviolet radiation. The atmosphere is where storm systems recycle water. Earth’s moon is larger with respect to Earth than most moons to their planets, so much so that the Earth and Moon are often referred to as a double planet system. The mass and proximity of the Moon create tides that probably helped early ocean life to begin and flourish (that is, the tides helped to mix things up). Most of Earth is not hot enough to kill off life nor cold enough to kill off life. And, so far, among the thousands of planets and moons we are aware of, Earth is the only place that has untold millions of forms of life, including people. THAT is why Earth is considered a unique planet.

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