Intro to Scientific Method Biology CPA
Designing and Experiment • Scientific Method • Observation • Question • Form a hypothesis • Experiment • Data collection and analysis • Conclusion
Observation and Question • Begins with observing something in nature • 2 types of observation • Qualitative – using senses • Quantitative – measurement • Wondering how or what about it • Ex: • Observation: Owls capture prey in the dark • Question: How do owls detect prey in the dark?
Hypothesis • Possible answers for question in mind that you can test with an experiment • Educated guess of how something occurs • Can be more than one • Ex: • Owls hunt in the dark by vision • Owls hunt in the dark by hearing • Owls hunt in the dark by sensing body heat
Experiment • Design an experiment to test your hypothesis • Controlled experiment • Control group • What you compare data to • Experimental group • What you are testing for • Independent variable • What is being tested for (ex: presence or absence of light) • Dependent variable • How the experiment responds (ex: if the owl can catch its prey)
Collecting/Analyzing Data • Collecting Data • Usually quantitative data • Compare experimental results to controlled results • Analyzing Data • Compare results to other studies and refine hypothesis • Create charts, graphs, tables to show data
Conclusion • Either supports or rejects your original hypothesis • If it supports • Can move on to construct a theory with research • If it rejects • Refine and change hypothesis and create new experiment