La investigates while objects are attracted by a magnet. She losts a paper clip, a crayon, and a nal. She holds a magnet two centimeters away from the object being tested. Each time she tests an item, she uses a different magnet in what we did she make mistake setting up her investigation?
She should have tested a total of 10 tems
She should have used the same magnet in each trial
She should have tested only one tom in her investigation
She should have had the magnet a centimeter away from each item.