Requirements for the development of life

"a biological system which has the ability to reproduce, mutate and evolve in response to changing environments"

"a material system which has the ability to self-replicate, mutate and evolve in response to changing environments"

"a material system which has the ability to reproduce, mutate and evolve in response to changing temperatures"

"a Biological system which has the ability to self-replicate, mutate and evolve in response to changing temperatures"

The entropy of an isolated system not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium.

As temperature approaches absolute zero, the entropy of a system approaches a constant minimum.

Strength & Quantity

Size & structure

Mass & Volume

Speed and Velosity

Carbon

Oxygen

Potassium

Hydrogen

Chemical bonds are not as strong, cannot form double bonds & and is more likely to bond with Oxygen to for smaller molecules rather than long chains.

Chemical bonds are not as strong, it always forms double bonds & and is more likely to bond with Oxygen to for smaller molecules rather than long chains.

Chemical bonds are too strong and will not break

Water exists as a liquid over a very broad temperature range. At atmospheric pressure this range is 0 to 100°C, whereas at higher pressures the range extends upwards to 363°C. There is no other abundant molecule which significantly overlaps this stable range.

Water exists as a liquid over all temperature ranges. There is no other abundant molecule which significantly overlaps this stable range.

Water is very unstable.

It is composed of H (Hydrogen) which is the third most abundant element in the universe.

It is composed of O (Oxygen) which is the third most abundant element in the universe.

There it a lot of H2O on earth thus abundant.

lot of energy is available in chemical reactions involving free (molecular) oxygen

lot of energy is available in chemical reactions involving fixed (molecular) oxygen

Oxgyen emits lots of energy

Temperature, atmospheric composition, mass and age

Time & Water present.

Protection from radiation, Moderate and stable temperatures & Atmospheric recycling mechanisms.

Protection from solar winds, Moderate and stable temperatures & Atmospheric recycling mechanisms.

Protection from solar winds, Moderate and water source & Atmospheric recycling mechanisms.

OZone, a molecule composed of three oxygen atoms, which absorbs the radiation.

OZone, a molecule composed of three hydrogen atoms, which absorbs the radiation.

OZone, a molecule composed of three carbon atoms, which absorbs the radiation.

OZone, a molecule composed of three nitrogen atoms, which absorbs the radiation.

0.6 to 1.5 astronomical units from the sun

1.5 to 3 astronomical units from the sun

3 to 6 astronomical units from the sun

6 to 9 astronomical units from the sun

Too much heat / Radiation

Not enough heat and too much radation

Not enough radiation to hot

Liquid water will not exist, the surface will be too warm, ultraviolet radiation from the central star may dissociate the water, breaking H2O into its constituents H and O.

Water is permanently frozen.

The presence of "greenhouse gases" in the atmosphere of a planet leads to warming of the surface

A planet being close to the sun thus being very hot

The Ozone layer stopping heat escaping the atmosphere

plate tectonics

Movable plates

Floating Plates

Tectonic ridges