Jair blogs

welcome to my blog here you can se ,consult and more thing of the sciense vocabulary.

domingo, 28 de noviembre de 2010

summary 9

The topic is about Evidence of change ,I dont know realy is this topic we have to make the summary  but I make it.The remains chage by the fossil ,the fssils are remains or trance ofan organism that have been preserve in earth crust.fossil include preserve forms of bones ,teeth,and imprints -such as footspring or the imprints of shell,leaves, and insects.To knows hw much a fossil is old we use the relative age and the absolute age.This 2 form are explain in other summary.With the fossil we cant use chemical to found the DNA  and we use chemical evience is another way of studing evolution.

summary 8

The topic is the Nervous System are form by neuron ,the dendrive is the nerve tha carries the massenges toward the cell body and axon are the nerve that carries the massenge away from the cell body .Your brain an your spinal cord are your central nervous system.All other nerves are your outher ,or peripheral nrevous system . Like telephone wires your nerve cell join together in "cables",caled nerve. Your brain is surrounded by youe bhard skull bones.It and your spinal cord are protec by specialfluid thet acts like a cishion against socks.We have 5 senses the seeing,tasting,touching,smelling and hearing.