I am measuring sky glow at the same location on different days i use a camera to measure it and i angle the camera at the same angle|||independent variable: Different days. This is what the researcher is changing on purpose
dependent variable: sky glow (distance measured by the camera)
constants: angle of the camera, same time of day, same location, same camera
control group: I'm not sure since the definition is a group not using the independent variable, which is different days. You have to do it on a day, you can't change that aspect, so I'm not sure. I guess you can use day 1 as your control.|||I think the dependent variable would be the sky glow, since what presumably will change, the independent is the angle of the camera, since that is what doesn't change, and controlled variables would be weather that night, the type of camera you are using, and which area of the sky you will be viewing.
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