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Scientific
Method
How
can we determine if something is a fact or an opinion? How can we
determine an answer to a problem? The answer is use the scientific method.
What
is the Scientific Method? It is a series of steps used to help solve a problem.
- Step 1. Make
an Observation. After making an observation of the natural world,
define the problem and make sure only one problem is being studied.
- Step 2. Research the problem
(question). Use all
available resources to collect data on the subject being covered.
Libraries, Internet, books, magazines, personal interviews, etc.
- Step 3. Develop a hypothesis (educated guess).
Make it a short definitive statement. It should be an "if"
then" statement. The “if” part will become the hypothesis and
the then part should be the results received at the end of the
controlled experiment. Remember your hypothesis can be changed it is
not formed in concrete.
- Step 4. Develop a controlled experiment.
A controlled experiment is an experiment that contains only one
experimental variable. An experimental variable is the thing
being tested. Everything else in the experiment or all other
variables must be the same. These variables are also called the controlled
variables. Keeping these variables the same allows the
experimenter to show that it was the experimental variable that caused
the results.
- Step 5. Analyze the data and come up with a
conclusion. The conclusion may or may not support the hypothesis.
Additional experimentation must then take place to build documentation
concerning the problem. If the hypothesis is proven wrong, change the
hypothesis, not the data.
Example:
| Observation: |
Toaster
stops working. |
| Question/Research: |
What
is wrong with the toaster? (Read toaster Manual.) |
| Hypotheses: |
(1)
It is unplugged. (2) The unit is burned out. |
| Experiments: |
(1)
Check the plug. (2) Take the toaster apart and look at the heating
wires. |
| Results
& Conclusion: |
If
it was unplugged the first hypothesis is supported, if the wires
inside are broken, then the second hypothesis is supported.
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