Soil reaction is a. the measure of the acidity or alkalinity of soil b. the highest amount of cations soil can absorb c. determined by the types of minerals in the soil d. the layering of soil into horizons

Which of the following statements best distinguishes a hypothesis from a theory? a. theories are hypotheses that have been proved. b.hypotheses are guesses; theories are correct answers c. hypotheses usually are relatively narrow in scope; theories have broad explanatory power. d. theories are proved to be true; hypotheses are often contradicted by experimental results.