2 Unit: Science in Action 9/10/12 Objective: SWBAT describe and utilize the scientific method to conduct an investigation. IA: What is the name of each tool below? What do we use each tool to measure? What is the name of the units they measure in?
3 Steps in the Scientific Method QuestionObservationHypothesisExperimentData CollectionConclusionRetest
4 Identifying the Problem Something is happening and I am curious to discover why or how it is occurring.Problems are specific and testableWhat does it mean to be testable?
5 Observations Gathered through your senses A scientist notices something in their natural worldWhat is an observation you can make about the class today?
6 Hypothesis A suggested solution to the problem. Must be testable Sometimes written as If…Then… statementsPredicts an outcome
7 HypothesisAn example of a hypothesis might be that the salamanders have curved tails due to a pollutant in the moist soil where they live.
8 A procedure to test the hypothesis. ExperimentA procedure to test the hypothesis.
9 Variable – factor in the experiment that is being tested
10 A good or “valid” experiment will only have ONE variable!
11 Scientific Experiments Follow Rules An experimenter changes one factor and observes or measures what happens.
12 Data Results of the experiment May be quantitative (numbers) or qualitative (description)
13 If I was conducting an experiment about how many miles my car gets for each gallon of gas, what type of data would I be collecting? Why? Pair with your neighbor and come up with an answer
14 DataMust be organizedCan be organized into charts, tables, or graphs
15 ConclusionThe the data obtained from the experiment to support or disprove a hypothesis
16 Solving a Problem 1)Identify a Problem 2) State Observations about the problem3) Form a Hypothesis about the problem (if…then…)4) Design an Experiment to test the hypothesis5) Collect Data6) Form a Conclusion7) Retest
17 Why should we retest an experiment? With the person sitting next to you come up with 3 reasons why.