I receive quite a few enquiries from students, and because I do not work in an educational institution it is difficult for me to find time to answer questions, many of which follow a standard pattern based on a US high school curriculum. If you are a high school student and you write to me directly, you will likely be disapponted because I'm not able to reply.
There are lots of places on the web where you can find answers to the high school questions about oceanography, oceanographers and careers in marine science.
The United States Office of Naval Research has prepared a very useful booklet that addresses many of the questions posed in the high school curriculum questions that you may have been asked to answer:
Here are some other useful sites for K12 students