To see how nutrients affect plant growth in a pond, Kayla sections the pond into three zones and makes one the control where she doesn’t add extra nutrients. What type of field investigation would this MOST likely be, and why?
(1 point)
Responses
a comparative investigation because it manipulates variables
a comparative investigation because it manipulates variables
an experimental investigation because it manipulates variables
an experimental investigation because it manipulates variables
a comparative investigation because it has different zones
a comparative investigation because it has different zones
an experimental investigation because it has different zones
an experimental investigation because it manipulates variables
This field investigation involves manipulating the presence of nutrients in the different zones of the pond to determine its effect on plant growth. By doing so, Kayla is conducting an experiment to test the hypothesis that nutrients affect plant growth in a pond.