Good afternoon.
Well, it sounds like you've got the toughest part done: you know your topic. As far as sample science fair research papers, or examples of other texts such as what you are to create, I suggest you conduct an internet keyword search for "science fair research papers"; this will give you an idea as to what is already out there.
As to "coldness" perhaps better could be "...weaken with heat and grow stronger with lesser temperatures" or something to that effect.
As to the introduction, I find it easier to write the rough draft with all of your data and information first, then do the conclusion, and wrap back around to the beginning and write the intro last. After all, how are you to write an intro explaining to your reader what you are going to tell them in the paper if you have not written the paper yet? :) I'm sure that once you have the rough draft organized you will find something to hook your readers with.
I hope this helps. When you get the rough draft together, feel free to post it to this thread and I can help you edit/proofread.
Regards,
Gloria
Moderator, EssayForum.com
Gloria, EssayForum.com