SCIENTIFIC METHOD
Steps of the scientific method
Problem: To determine…
Hypothesis: educated guess. An if… then… statement
Materials: stuff needed for experiment
Procedure: specific steps
Data: tables and graphs
Conclusion: Did you support or refute your hypothesis? Any errors?
Characteristics of a reliable experiment:
- must have a control and experimental group
- large sample size
- only one factor being tested
- more than one trial
- can be repeated and obtain same results
Controlled experiment
Control group – factor in an experiment that scientist purposely keeps the same. Used as a comparison
Experimental group - factor in an experiment that scientist changes ( receives the treatment) in order to test it.
Theory – explanations based on evidence
Law - statement that is always true
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