When did life first appear? - FamousWhy
FamousWhy
USA
Famous People Famous Regions Famous Articles Famous Software FamousWhy Web Services Famous Forum Submit Content
|


Statistics:
Visits: 262
Votes: 0
Fame Riser
          
Fame Rank
N/A
Fame Riser
create pool

 

Articles


Ask a Question about When did life first appear?

Famous Tags


education   children   school   inclusive   history   learn   life   parents   society   students   family   novel   people   teachers   about   england   teacher   nature   britain   english   personality   important   mistakes   good   what   language   language teaching   romania   attitude   problems   communication   experience   process   study   middle ages   integration  

All Tags


 

When did life first appear?

 Q:   Ask a Question about When did life first appear?       
When did life first appear? The first signs of life are thought to have appeared about 3,000 million years ago. Some rocks from this time contain substances that are characteristic of life, although fossils appear from much later.

Scientists believe that primitive life forms altered the original poisonous composition of the atmosphere, eventually releasing the oxygen that we need to survive. The seas were probably once filled with a mixture of chemicals from which life may have developed.

It is more likely, however, that life first appeared in areas such as those around undersea vents. These first forms of life would have been bacteria and microscopic blue-green algae.


Tags: life, bacteria, science



Category: Education  - ( Education Archive)

Date Added: 12 December '11


Add a link to this page on any related website, blog or forum using this code :