Why is skin grafting necessary in third-degree burns

A third-degree burn is the most serious type of burn, as it involves all layers of skin and can severely damage muscle and tissue. Skin grafting is necessary to provide a protective layer for the burned area so that it is able to heal. It acts as a protective barrier so that bacteria isn't able to infect the burned portion of skin and reduces the course of treatment needed.

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.  

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.  

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

i would have a lunch. it's one big package of food, making it one food. : p