What process is believed to be responsible for the formation of the Grand Canyon? A. diverging tectonic plates
B. converging tectonic plates
C. caving in of the ground due to erosion.
D. erosion over a long period of time

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Prior knowledge can be gained from personal experience and a) forming well-developed hypotheses. b) listening to opinions of other people on a topic. c) researching previous experiments and results on a topic. eliminate d) no other methods. it can only be gained by personal experience.

How does a catalyst influence a chemical reaction?