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2015/02/13

MONTESSORI THE GREAT LESSONS : The Carboniferous Period



 The Coming of Life



 The Carboniferous Period

  The land plants developed greatly
but they still did not have flowers
or fruits. They had huge trunks 
with small leaves at the top. 





The lowlands were covered with 
these strange forests which became
 great swamps when the shallow
 seas flooded and recede.





Buried under water the trees died and 
from them peat moss was formed. 
After centuries and centuries these
 trees turned into coal. There are 
constantly new forests and new floods. 


carboniferous - Google Search


  Iron deposits were also being formed
in the earth. Now that the air had been
 purified by the plants, some animals were
able to leave the water and learn to live
on land. These were the amphibians, 
first vertebrates to live on land. 


Meganeura was an extinct insect from the Carboniferous period approximately 300 million years ago with wingspans of more than 75 cm (2.5 ft) wide


 At this time there were so many
giant insects. Some dragonflies
 had thirty inch wing spread.


      Dinosaur graphics
  Pinegreenwoods Montessori 
 The Coming of Life