d. It ensures that the people doing the experiments are scientific For items 11-15: You want to prove that trees lower the air temperature under because of the shade. You stand under the tree, hold out an thermometer under the shade for a few minutes, and record temperature. You then move to an area where there are not record the air temperature. 11. What is the experimental setup? 12. What is the control setup? 13. What is the idependent variable? 14. What is the dependent variable? 15. What factors will you keep constant?