Question

John loves trout fishing so much that he goes trout fishing several times throughout the year. He began to notice that during the dry season the trout had significantly more lice on them than during the rainy season. John, a curious science student, wanted to find out what was causing the increase of lice on the trout. write a testable hypothesis to help John focus his research

Answer 1

A hypothesis could be "the amount of water affect the number of lice found on the trout".

Experiment could be designed with pools with different amounts of water in it. Pools with less water represent the water during the dry season, while those with more water represent the rainy season.