Can be disproved - supported with repeated testing - valid if there is no evidence to dispute it the list of terms best describes a a) hypothesis. b) law. c) theory. d) variable.

C.  Theory.  Theories are accepted explanations of phenomenon based on no evidence to dispute it.  Theories can be disproved and are not perfectly accurate.

Its C) A scientific theory summarizes a hypothesis or group of hypotheses that have been supported with repeated testing. If new evidence is found, a theory can be refuted.

a electromagnetic waves

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.