For which of these questions could a testable hypothesis be developed? Check all that apply.Does a flu shot hurt worse than a pneumonia shot?Will breeding a red rose with a white rose make a pink rose?Are pecans better tasting than walnuts?Will practice help improve your reaction time?Whose pulse rate increases more after running up and down a flight of stairs, that of an adult or child?
The dependent variable is .
The independent variable is .
Which statements correctly describe theories? Check all that apply.Theories may be revised over time.Theories cannot help predict what may happen in the future.Theories are proven facts.Theories result from several repeated experiments.Theories are based on a single hypothesis.Theories explain observations and hypotheses.
For what reasons could a theory be changed or replaced? Check all that apply.A new, untested hypothesis is proposed.New information is discovered that does not support the theory.A single experiment produces results that differ from all previous experiments.New technology is developed that provides more information about the theory.New experimental methods are designed to test a theory.
Did you find these answers helpful?