Which layer of earth does a tectonic plate ride on top of

List four observations that indicate that a chemical reaction may be taking place

Displacement is the slope of a velocity vs. time graph a. true b. false

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.