Why Earth is unique?

6 Factz on

"Why is Earth Unique"

1.What make Earth unique?

 After Earth's emergence life developed into many forms on earth. Liquid water and oxygen for breathing made this possible. Millions of species on. Earth depends on water and soil and water covers more than two-thirds of the Earth's surface.

2. How was Earth formed?

          
About 4.8 billion years ago Earth with sun and other remaining particles originated from dust particles which agglomerated gradually. At that time the young Earth was bombarded by countless meteorites from space.
The Earth's interior was molten and volcanoes erupted constantly. Over millions of years, Earth's surface cooled down. Again Over the years , around 3.8 billion years ago, the temperature touched down as low as about 100°C and Earth's crust started becoming solid. At this time gaseous cover over on the earth was mostly made up of water vapour.

3.Why did life develop on Earth?

The life on Earth developed through a fortune of series of events.it includes

• The Earth's distance from sun
• liquid water and availability of oxygen(not just water vapour)

The adequate distance from sun made the atmosphere and surface to cool down to a moderate level.the cooling of earth gave rise to a kind of  'primordial ocean' . The action from UV rays of the sun, the lightning flashes produced by storms, and the countless volcanic eruption lead to new complex chemical compounds.about 4 billion years ago, the first molecules appeared, from which the unicellular organisms were developed.

4.How was Oxygen formed?

About 3.5 billion years ago oxygen was created on Earth's surface.the UV lights from sun decomposed water vapour molecules into oxygen and hydrogen. In seas the blue-green algae carried out photosynthesis using sunlight and carbon dioxide for energy which in turn returned a waste product as oxygen into atmosphere.

5.What if there was no water?

There would be no flora and fauna on the planet. Drastically the oxygen count on atmosphere will lower.Absence of oceans would have serious consequences ass they moderate climate by storing heat inside them.the temperature difference between day and night in between summer and winter would be very large.

              

6.Life existence on other planet.

There is no life on other planets in our solar system because only earth have adequate climate and atmosphere for life support system.Still there is a celestial body which have chance of life on it. Europa, the moon of Jupiter. scientist say that an ocean of liquid water could be present on Europa as thick as 10 km .

Image of Europa