3.1; Scientific Principles and Processes Flashcards
Scientific cycle
Series of steps that biologists use to investigate phenomena in a testable, measurable and reproducible way
With the ultimate sum of explaining one’s observations by refining a hypothesis
Series of steps that biologists use to investigate phenomena in a testable, measurable and reproducible way
With the ultimate sum of explaining one’s observations by refining a hypothesis
Scientific cycle
Stages in scientific cycle
Observation
Construct a testable hypothesis
Experimental design
Gathering and analysis of data
Evaluation of results and conclusion
Why is the scientific cycle a cycle
In science, refinement of ideas is the norm
Scientific knowledge can be thought as the current best explanation
Is a negative result valid
As long as the experiment is well designed
What is failure to find an effect
Negative result
What is a negative result
Failure to find an effect
Two causes of negative results
Hypothesis is wrong
Experiment carried out incorrectly
Hypothesis is wrong
Experiment carried out incorrectly
Two causes of a negative result
Non falsifiable statements
Can’t be proven false
Your hypothesis must be…
Testable
What is a null hypothesis
There will be no statistically significant effect as a result of the experiment treatment
There will be no statistically significant effect as a result of the experiment treatment
Null hypothesis
When can the null hypothesis be rejected
If there is evidence for an effect which is unlikely due to chance
