What do they mean about the problem on a science fair board?

Answer 1

The problem is the question you're trying to solve or the fact you're trying to prove. It's like the purpoe of why you're doing the tests. The problem is the question you're trying to solve or the fact you're trying to prove. It's like the purpoe of why you're doing the tests.

Answer 2

What your instructors mean is that you must put your problem that you solved with your invention on your illustrated board. For instance, did you build a volcano? Then you must present the problem of lava flow. Did you build a better mousetrap? How is it better than the one you are replacing. You need to write up the problem that you are solving. After all, they can't judge what you did unless they know what you are solving.This Isnt answering the question for a 5th grader so most people should not use this answer