Question

1. how does the amount of oxygen in the water affect the oyster population? constant/control variables: __ hypothesis/prediction: __

Explanation:

Constant/Control Variables could be factors like water temperature, salinity, presence of predators, type of substrate in the water body etc. as these can also impact oyster population and need to be kept the same to isolate the effect of oxygen. Hypothesis could be that as the amount of oxygen in the water increases, the oyster population will increase up to a certain point because oysters need oxygen for respiration.

Answer:

Constant/Control Variables: Water temperature, salinity, presence of predators, type of substrate.
Hypothesis/Prediction: As the amount of oxygen in the water increases, the oyster population will increase up to a certain point.