The human ear receives sound waves and converts them to signals that are processed by the brain

Explanation:

The human ear is the organ for hearing. It converts sound waves into electrical impulses through which the brain processes to facilitate our hearing.

The ossicles inside the ear amplify sound waves they collect from the environment and transmits them into the inner ear.

Once in the inner ear, they are converted into electrical signals the brain can easily understand and discern.

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 .. .

helicase, i think thats it