Which characteristic is common in young rivers? a. a wide, u-shaped channel b. location far from headwaters c. a steep stream gradient d. many tributaries

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.