Which best describes an experiment that had good scientific design? most of the methods were different for each trial within the experiment. the data could not be replicated in another experiment. each trial was repeated several times during the experiment.

Light waves can move through , but they travel fastest when they move through a(n) .

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these