Experimental design presentation
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Transcript of Experimental design presentation
How do we solve problems in science?
Scientific Inquiry & Experimental Design
The scientific method…
State the problemForm a hypothesisProcedureResultsConclusion
Let’s have a more in depth look at what scientist actually use and more scientific terminology.
Experimental Design vs. Scientific Method
Experimental Design Scientific MethodResearch QuestionFormulating
HypothesisCareful ObservationData GatheringAnalysis of Data
Identifying patterns in the data
State the problemForm a hypothesisProcedureResultsConclusion
Types of Experimental DesignDifferent research questions
require different experimental designs.
Descriptive Investigations
Experimental Research Design
Descriptive InvestigationsAn investigation used to explore questions in
environmental conditions you cannot control.Ex. Jane Goodall’s study of chimpanzees.Picture hyperlinked to: www.janegoodall.org/media/videos
A hypothesis is not required in these investigations.
Experimental Research Design
Can be used when focused on a single variable.
Conditions can be controlled.Determines the cause of a problem.
Ex.: Thumb Wars
Experimental Research Design:Thumb Wars
1. Research Question2. Hypothesis3. Gathering Data4. Data Analysis
Patterns in the data
5. One variable tested: thumb length
Experimental Research DesignResearch Question: Do plants grow better in coke or water?
Do plants grow better in coke or water?Research Question: Do plants grow better in
coke or water?
Hypothesis Ex: Plants will grow better in water because plants need water to live.
Gathering Data: Controlled experiment with one independent variable.Independent Variable: Type of liquid given to plantsDependent Variable: Measured growth of each
plantConstants: Conditions kept the same (such as
amount of liquid, type of plant, soil, amount of sunlight)
Do plants grow better in coke or water? (cont.)
Analysis of Data : Using graphs/tables to find trends in the data.