Greet the judges warmly and make eye contact during the presentation. Point out important features on the display during the presentation.
Know your topic well enough to respond to questions about your research and the process for building your project. Answer honestly if you don't know an answer to a question.
Speak clearly and loud enough for the judges to easily hear you. Do not chew gum.
Demonstrate how your project works without blocking the view of the judges.
Pay attention to appearances. Your appearance and the appearance of the project will make an impression on the judges. Dress nicely and make sure your display is neat and legible.