explain the difference between sensorineural deafness and conductive deafness, and then give 2 causes of each?

!!!You put it in the wrong category, this is not chemistry !!!
Conductive :
Conductive hearing loss occurs when sound is not normally conducted through the outer or middle ear (or both). Since sound can be picked up by a normally sensitive inner ear even if the ear canal, ear drum, and ear ossicles are not working, conductive hearing loss is often only mild and is never worse than a moderate impairment. Hearing thresholds will not rise above 55-60 dB from outer or middle ear problems alone. Generally, with pure conductive hearing loss, the quality of hearing (speech discrimination) is good, as long as the sound is amplified loud enough to be easily heard.

A conductive loss can be caused by any of the following:

* Ear canal obstruction
* Middle ear abnormalities:
o Tympanic membrane
o Ossicles

Sensorineural hearing loss :
A sensorineural hearing loss is due to insensitivity of the inner ear (the cochlea), or to impairment of function in the auditory nervous system. It can be mild, moderate, or severe, including total deafness.

Sensorineural hearing loss can be caused by any of the following:
Long term exposure to environmental noise
Genetic
Disease or illness
Medications
Physical trauma