The answer should be surface.
Answer:
Start by introducing your topic. What are you learning about? How will it impact your life or the lives of others? Give some context, or background information, to your audience if it is an uncommon topic. Try not to explain anything about your experiment or the data that you collected. Share what you were trying to find out, what your problem was. Conclude it by introducing how you started to research.
Look up projects on prezi. https://prezi.com/b7z6_cxdp9bm/the-water-carbon-and-nitrogen-cycle/
https://prezi.com/ju-hbhzzc0hu/the-water-cycle-carbon-cycle-and-nitrogen-cycle/
