SCIENTIFIC METHOD A step by step process that scientists use to solve problems
STEP 1 State the Problem or Question What is it you want to know? For Example: Why are there worms on the sidewalk after it rains?
STEP 1 a Research or gather information – if someone already solved it, why do the work?
STEP 2 Form a Testable Hypothesis Propose a solution to the problem based on available information this is an educated guess or an inference For Example: If rain turns into worms, then that’s why worms are on the sidewalk after the rain.
Scientific Theory A well tested explanation of something that occurs a wide range of observations or experimental results goes into a theory This is NOT a fact. It has just not been proven wrong. There is still the possibility it could be. Examples: Evolution, Relativity
Scientific law A rule describing a consistent pattern in Nature. It happens every time, all the time. Examples: Gravity, Thermodynamics, Motion
STEP 3 Design an Experiment experiments are used to prove (or disprove) a hypothesis experiments must be done and explained in a way that they may be repeated!!
Design an Experiment experiments contain 2 parts: experimental set-up - contains variable being tested control set-up - same as experimental set-up w/out the variable
Design an Experiment Variables- a factor that can change in an experiment Independent OR Manipulated Variable- The one factor that the scientist changes during an experiment; also called the independent variable Dependent OR Responding Variable- The factor that may change in response to the manipulated variable; also called the dependent variable
STEP 4 Collect & Analyze Data information that is observed or measured must be recorded -- this is data observations require detailed descriptions measured data is most often recorded in data tables & graphs used to compare/contrast info
STEP 5 Draw Conclusions What are the results telling you? Does the data support the hypothesis?
Draw Conclusions Does the data oppose the hypothesis? If so, do you need to change the hypothesis or throw it out and start over? Does the answer to your problem present any new questions/problems?
Step 6 Communicate Your Results Publishing your results enables others to review your work. What good is new information if only you know it? Examples: A paper for class, an article in a newspaper or magazine, etc… Scientific Method Song Scientific Method Song