Crossword Puzzle Crossword - Flow of Matter RespirationOnline version Crossword - Flow of Matter Respiration by Benjamin D Morgan 1 Matter inputs for respiration come from this reaction 2 How fast molecules move. 3 Energy from the movement of light particles 4 Product of cellular respiration 5 Output molecules 6 Needed for a chemical equation 7 A reactant of cellular respiration 8 An example of chemical energy 2 4 6 1 3 7 5 8