8. What is the first step in Scientific investigation? A. Experimenting B. Defining a problem C. Drawing conclusion D. Formulating hypothesis 9. Scientific knowledge changes and grows due to A. Asking questions and re examining old ones B. The use of new technologies C. The discovery of new information D. All of the above 10. If a tested hypothesis Does NOT produce the expected results. A. The experiment was a wasted of time B. Keep it for it might lead to another discovery C. The experiment was done wrong D. Manipulate the data to fit the hypothesis 11. The statement "Cora has a stain on her shirts an example of, A Law B. Prediction C. Observation D. Hypothesis 12. In an experiment the variable that you will measure is, A. dependent variables B. independent variables C. experimental D. Hypothesis 13. Anything that can change in an experiment is called A. measurement B. observation C. variables D. qualitative 14. .All good experiments should be A questionable B. testable C. explainable​