Science Buddies: "Ask an Expert"

I did my science fair experiment 3 times, in Materials Do I need to list all items ?
ex I used 10 petridishes at a time.
Do I need to put Petri Dishes 30 in the list?

I think it is best to be thorough. Either list 30 or list 10 and note that that was the quantity for one run of the experiment, which you did 3 times.

Cheers,
Colin

Thank you.