discentiam 13. Which of the following questions is best comedes a. Who invented electricity? b. How long did dinosaurs live on Earth? c. How many koalas are there in Australia? Does the amount of salt in water affect the temperature at which boils? 14. What is the process of obtaining information using your serves? a. inquiry b. conclusion c. observation 15. What variable can be changed or manipulated? a. dependent variable b. experimental variable C. Independent variable Part II. Performance Task. Directions: Design a simple scientific investigation on a specific problem in your area or at home. Write it in clean answer sheet. Use the scientific methco in your investigation. Describe each step that you will do to solve the problem Observation Question​