Forming a Scientific Hypothesis When following the scientific method, forming a hypothesis takes place after asking a testable question and conducting research. A hypothesis is an educated guess or prediction about the outcome of an experiment. A hypothesis must be testable and contain an independent and dependent variable. Directions: Look at the following experimental questions. You are to develop a hypothesis for each one. 1. How does the type of material affect how long it takes a shirt to dry? _____________________________________________________ _____________________________________________________ _____________________________________________________ 2. Does listening to music lower heart rate than another type? _____________________________________________________ _____________________________________________________ _____________________________________________________ 3. How does weather affect your mood? ______________________________________________________ ______________________________________________________ ______________________________________________________ 4. Which type of fruit is more acidic: lemons, oranges, or watermelon? ______________________________________________________ ______________________________________________________ ______________________________________________________ 5. How does the type of music that a person listens to while exercising affect how hard he or she works out? _________________________________________________________ _________________________________________________________ _________________________________________________________ 6. How does tire pressure affect a car’s fuel efficiency? _________________________________________________________ _________________________________________________________ _________________________________________________________ 7. Which uses more water: a shower or bath? _________________________________________________________ _________________________________________________________ _________________________________________________________ 8. Does a person’s age affect their reaction time? _________________________________________________________ _________________________________________________________ _________________________________________________________ 9. How does caffeine affect a person’s heart rate? _________________________________________________________ _________________________________________________________ _________________________________________________________ 10. Does the amount of time a student spends watching TV affect his or her grades? _________________________________________________________ _________________________________________________________ _________________________________________________________