Research Papers / Research paper topic choice (Physics, Chemistry, Biology, Maths) [4]

Hey guys,

I'm a high school senior and i am required to write a research paper.
The topic has to be choosen out of a number of subjects i have, these are : Physics, Chemistry, Biology, Maths ( i take an advanced course)

I am supposed to combine 2 of these subjects and then write a research paper on a topic out of the aspect of the 2 topics. As i am a high school senior it doesn't have to be an extremely advanced topic.

Thanks in advance!

Stark