Scientific Method Biology
What are two characteristics of a Hypothesis?
-testable -all variables must be measurable -falsifiable -must be able to have a wrong hypothesis
Experimental Group
-the group in the experiment that recieves the variable being tested, compared to the control group
What is step 5 of the Scientific method?
Repeat the whole process
Control Group
a group of subjects closely resembling the treatment group in many demographic variables but not receiving the active medication or factor under study and thereby serving as a comparison group when treatment results are evaluated
Hypothesis
a suggested explanation of the observation or a possible answer to the question posed. It provides a casual explanation or some correlation
What is a hypothesis based on?
facts
Independent Variable
the variable or experimental condition being manipulated or tested by the experimenter. It is the variable that may affect the dependent variable, how much treatment is used
Dependent Variable
the variable that will be measured, counted, or observed
Controlled Variable
those other variables that may affect your dependent variable. these controlled variables must be kept constant for all groups throughout the experiment. This is important because the underlying assumption in experimental design is that the independent variable is the one and only affecting the dependent variable.
Predictions based on hypothesis
-Much more test specific -If my hypothesis is true, then I expect to see X result in an experiment
Testing your hypothesis
-There are three ways to test hypothesis -Further observation (qualitative) -Synthesis of Data (quantivtative) -Experiments
What is step 6 of the Scientific Method?
Conclusion
What is step 2 of the scientific method?
Proposing a Hypothesis
Observations and Questions
Question your observations, that is what scientists do
Repeat the Whole process
Look for signs your hypothesis is/ is not supported
What is step 3 of the scientific method?
Making predictions based on your hypothesis
What is step 1 of the Scientific Method?
Observations and Questions
What is step 4 of the scientific method?
Testing your hypothesis
Can a hypothesis be right?
no, it can only be supported by data
What must a procedure include?
one or more levels of treatment, establish a control group, and the number of replications
What do scientists look for when people repeat labs?
patterns
What is the second part of the experiment?
procedure
Conclusion
researcher always goes to prediction for the results, is results match prediction, the hypothesis is SUPPORTED, the hypothesis is falsified if the prediction and conclusion doesn't match