Presentation on theme: "The Scientific Method What is it???"— Presentation transcript:
1 The Scientific Method What is it??? A process (a series of steps) that is used to find the answers to questions about the natural world around us.Humans have always been curious and asked questions or tried to solve problems.Why is the sky blue?How do birds fly?What’s the quickest way to walk to school?
2 The Steps of the Scientific Method A mnemonic device to help you remember the steps (like PEMDAS)
3 The Steps of the Scientific Method P = Problem/Question to be answeredO = Observation/ResearchH = HypothesisE = ExperimentC = ConclusionS = Sharing
4 ProblemProblem or Question to be answered Good Ex. Will fertilizer make plants grow taller? (measurable) Poor Ex. Will fertilizer make plants grow better? (not measurable)
5 Observations/Research Can use ALL 5 senses *sight, hearing, touch, smell, taste Research what is already known
6 HypothesisA testable statement sometimes written as “If…then” Ex. If I add fertilizer, then the plant will grow taller Can also be written as a statement Ex. Cold temperatures decrease the number of cricket chirps
7 Experiment Tests the Hypothesis Materials, Procedure, Data Collection 2 GroupsExperimental Group-receives special treatmentControl Group-receives no special treatmentUsed as a COMPARISON!The more trials the better!!Needs to be reproducible!!!
8 Or what changes during experiments…. What are variables?Or what changes during experiments….
9 Independent Variables What is tested by the scientistWhat is changed by the scientistAlso known as manipulated variables.
10 Dependent Variable What is observed What is measured The effect caused by the independent variable.“Depends on the independent variable”The dataAlso called responding variables
11 Controlled Variables Things that could change but don’t Kept constant (the same) by scientistsThese allow for a fair test.
12 ConclusionBased on the data, either your hypothesis is supported or rejected “The data supports my hypothesis” or “The data does not support my hypothesis”