KSU Biology 198 Exam 1 Questions and Correct Answers

Microscope A device used to see tiny organisms, used for research and counting. Spectrophotometer A device that passes light through a substance in order to assess the absorption and transmittance. Absorbance Measurement of the amount of light captured by the dissolved or suspended material. Transmittance The fraction of incident light at a specified wavelength that passes through a sample. Investigated The questions that are asked in science should be able to be _______. Hypothesis A prediction for why something is the way that it is, or why something occurs. Should be testable and falsifiable (able to be disproved). Theory A _____ is a well confirmed answer/prediction/explanation of nature that is supported by large body of evidence. Observation The act of watching something in order to gain information. It is completed before making a hypothesis. Experiment An orderly procedure carried out with the goal of verifying, refuting or establishing validity of a hypothesis. Control A group that is separated from the rest of the experiment where the variable being tested cannot effect it. Variable Any factor that can be controlled, changed or measured in an experiment. Life _____ distinguishes organisms from inorganic objects and dead organisms, being manifested by growth through metabolism, reproduction and the power of adaptation. Life The following are characteristics for what? -organized -require energy -grow and develop