Which of the following defines a constant? What happens because of what was added or changed in the experiment
All things that are kept the same in an experiment
What is added or changed in the experiment
Those that were left alone in the experiment or was set as the standard

-hails tea

explanation:

-t poses

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.