What allows Earth to support life? What characteristics set it apart from other planets in our solar system?

Answer 1

The main thing is earths distance to the sun. This made liquid water possible. As water condensed it dissolved almost all the CO2 and turned it into carbonate rock. Venus had all the same things but being too close to the sun water never condensed. And so the CO2 remains in gaseous form making the atmosphere 90 times as dense as earths. Earths atmosphere was just as dense in the beginning.
Earths mass is also just right. It enables the atmosphere to remain. Mars also had a much denser atmosphere and liquid water but being too light the atmosphere escaped. Earths more massive core also generates heat that causes the interior of earth to be molten. That, along with earths rotation, generates the magnetosphere that also protects earths atmosphere. Mars has the rotation but not enough heat to keep the core liquid. And so hardly any magnetosphere. Venus is massive enough to have molten interiors but doesn´t have the rotation. So hardly any magnetosphere there either. And so most of the water that once existed is now lost.

Answer 2

Well prior to 2001 it was thought and used that mass puts pressure on space and the greater the Mass the more physics in space is being affected..( General Relativity )
Sci-theory...Our Universe was created in a Vacuum and charged matter was induced into it By God himself..( Creation was Born ) The Earth is mostly a water mass and has a inner and upper armophere that is surrounded by Vacuum ,and all life was created from the Dust of the Earth. ( Fusion the Hand of God at work ) A planets inner design determines it's upper atmosphere and upper atmosphere layer pressures.( Not the other way around as in General Relativity ) Mass does not put pressure on space..The Sun supplies the Earth and the Earths water with Relative light Matter energy..( Engineering a working World Relative to light energy )

Answer 3

The water is the most important, the hydrogen has a slightly negative charge, and the oxygen a slightly positive one. This make it an excellent solvent and allows other molecules to bind together easily, allowing the formation of amino acids.

Don't forget ozone (O3) which helps deflect UV rays, as well as the overall temperature range. We are also lucky to have a large gaseous planet, Jupiter, and it's gravity which helps deflect many asterioids and such.

Answer 4

Abundant *liquid* water---critical to life, the moon being the right distance away to produce tides of the proper size which cleanse the oceans, an atmosphere with the right combination of gases, the ozone layer to shield us from UV rays, the magnetic field of the earth to protect us from solar radiation, a molten core to provide heat, a solid surface of the earth to provide habitat for plant and animal life, a stable climate with no wide daily fluctuations of temperatures, the proper mass and gravity to prevent the loss of atmosphere, an angle of axis for rotation provides double the arable land, a proper distance to the sun...not too far to reduce surface temps or not too close to make temps too high. Also the presence of gas giant planets helps sweep away devastating debris from striking the earth.

Answer 5

Water, protection from space debris by our atmosphere, and the oxygen/nitrogen mix

but then again this is for most mammal, reptilian and other forms of life similar to ours, but life can be on a micro bacterial scale...

these are answers we don't really have, because any space body can and probably does support microbiological life

Answer 6

The existence of water - important

Atmosphere that stops some meteors/comets

Right distance from the sun. Not freezing not scorching

Answer 7

The core of the planet.

When it stops being hot and molten, all life will stop.

Answer 8

It is crucial that there be plenty of water and that it not be so hot that the water is necessarily steam, nor necessarily ice.

That is, its liquidity is crucial.