First of all, do you have a systematic name for this campound? "MOED" only means something to people who know what "MOED" is a acronym for.
With regards to presentations: you rarely do poorly when you stroke the basic science angle:
What reasons did you have to do this experiment in the first place (what gaps in knowledge were you addressing -or- what were you trying to show off)?
Who worked on this before you, where did they work, and when were major breakthroughs made?
What was your hypothesis and how did you arrive at this hypothesis?
How did you design your experiment(s) to address the previous question?
What were your results and what do they mean?
Why the hell should anyone care about what you did at all (hat's the context of these findings)?
Make sure you hit all 5 W's and the H (who, what, when, where, why, and how?)
Remember, no matter what you've heard about scientists, you're presenting to a room filled with suggered up kids suffering from ADHD. More pictures = more better. More text = I've got a million better things to think about than reading that stuff. First priority is verbally communicating content, second priority is graphically communicating content, third priority is communicating it with text (If you ever find yourself indicating a selection of text with the laser pointer, you've screwed up enormously*). Finally: practice, practice, practice. Your presentation should sound like you've done it plenty of times before and this one ain't no big thing.
*This is for the main body of the presentation. Obviously you will need some text to keep things straight, but the only time you should have a slide that is 100% text is during your overview and recap slides. These are important slides to have because they introduce key concepts and give the audience things to pay attention to, and to recall their attention to your main points when you're done (ADHD again). Don't make them brutally long and detailed either, that's what the body is for.