scientific method

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Scientific Method
 State the Problem
 Develop a Hypothesis
 Design an Experiment
 Collect and Interpret Data
 State a Conclusion
 Communicate Results
1.  State the Problem
What are you trying to find out? Ask the
specific question the experiment is
attempting to answer. Must be testable.
(Does air temperature affect the chirping of
crickets?)
2. Develop a Hypothesis
A hypothesis is an educated guess for a
possible answer to the problem. Hypotheses are
developed by using personal experiences or
research. All hypotheses should be written in a
complete sentence in this format: If______
then_______ because ________. ( If the
temperature rises then crickets will chirp more
because I hear them more on summer nights.)
3a. Design an Experiment
An experiment includes materials and a
procedure. The procedure is a series of
steps that needs to be followed in the
correct numerical order.
3b. A Controlled Experiment
•  A controlled experiment has two identical set
ups; a control and an experimental group.
Every variable or factor is identical in each
group, except for the manipulated variable.
This variable is controlled by the scientist.
The responding variable is what the scientist
is keeping track of during the experiment.
(How is the cricket experiment set up as a
controlled experiment?)
4. Collect and Interpret Data
Data is information you collect as you perform the
experiment. Organize all your data in a data
table and then analyze or examine your data
using a graph. Graphs can often show patterns
that you might overlook in a data table (line
graph, bar graph, etc.). (The number of cricket
chirps every minute at each temperature was
recorded and graphed.)
5. State a Conclusion
The conclusion is a brief summary
that ties everything together. Include
whenever possible the following:
•  Does your data support your hypothesis? Why or
Why not?
•  A brief summary of the experiment and the results
•  A discussion of lab errors if any
•  Support your hypothesis with additional research
(Results show that crickets do chirp more at higher
air temperatures.)
6.Communicate Results
•  After stating a conclusion, the scientist
will then share his/her conclusions with
others via internet, meetings or journal
articles. Before communicating, a
scientist may conduct several
experiments in order to get the most
accurate results possible.
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