Which one of these is always part of using th scientific method?

What solution is KBr? Which subjective method is best to measure human activity of adults discuss in detail? How do Darwin's finches exemplify speciation? What can help you collect and store information? Cyclohexane physical state? What does it mean when your knee bones pop all the time? Is a field mouse an omnivore carnivore or herbivore? Which does not state a principle related to why ground wires are in effective safety device? Is 6 days before a missed period too soon for a blood test? What is an acetable? How many cm is 22nm? How does air density affect flight? What is a topic for a non process informative speech? What are the categrous? What size buttonhole is needed for a button with a circumference of 7.38 centimeters Use the value of 3.14 to represent pi? What is a jerryatric? Which tool can measure only one quantity of liquid? What do you say when you sneeze? Which thing when it dry 1 kg wet 2 kg and ash 3kg? What is gel and Emultion?

Which one of these is always part of using th scientific method?