I think it is important that in your essay you first note what is the Mozart Effect, who researched or came up with the buzzword, where it was published, and what has been the result of its publication. That will take u easily to 350 words or more.
Here is some information to help you out:
"The Mozart Effect" was cited by Shaw, Rauscher, and Levine as a reaction that supposedly occured when students were tested on their acquisition, retention and application of spatial intelligence. In their experiment, they argue that out of the three variables in the study, relaxation music, Mozart sonatas, and I believe it was either white noise or another form of sound, the students performed better when listening to the sonata.
These results were published around 1998 in the MuSIca journal, and in publications such as the Times, and Nature. The hypotherical reasoning is that Mozart's music will make you smarter.
Personally, I have a hard time with these so-called studies. First, the variables were not all fair. They presented three scenarios in which students performed according to what they heard, yet, we are not considering the personal preference of the students nor the reasoning behind their preference for the music.
Also, the study (to me) is hardly experimental. I sense that there was a biased assumption that Mozart will indeed make your somewhat feel better and all the elements in the study were present to prove them right.
Like Pomphei said, I think this is sort of another way to promote someone's idea, and unfortunately there is always going to be a market for interestingly-named novelties.
First, we cannot write essays for you on this site. But hopefully we can help you figure out what to write.
The Mozart effect is based on the idea that listening to Mozart's music raised the IQ of young children. The idea is, generally, that Mozart's music is so complex that it can make kids smarter just listening to it.
I am not qualified to judge the scientific merit of this theory. However, it is clear that many entrepreneurs have jumped on this bandwagon and tried to market things (such as Baby Einstein) based on the idea that you can make your baby smarter in some easy-to-do and semi-miraculous ways.
In my opinion, these things are what used to be called "snake oil." They are just ways to prey on parents' fears that their kids won't be smart enough. We can see that from the recent admission that Baby Einstein stuff does not do what it claims to.