# Scientific Method

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```					Scientific Method
Steps in the Scientific
Method
   Identify a Problem
   Hypothesis
   Experiment
   Collect Data
   Conclusion
   Retest
Observations

  Gathered
through your
senses
 A scientist
notices
something in
their natural
world
Observations
An example of an
observation is that
I observe that using
different routes to
walk from my desk
to the office and
back can affect how
long it takes to get
there.
Question
- So, I form it as a     A blindfold is
question that I       probably not a
good idea
“What is the
fastest route to
the office and
back?”
Hypothesis
   A suggested
solution to the
problem.
   Must be testable
   Sometimes written
as If…Then…
statements
   Predicts an
outcome
Hypothesis
   An example of a
hypothesis is that
using the stairs
closest to my
classroom is the
fastest route to the
office and back.
Experiments Need

   A procedure
to test the
hypothesis.
   An
experimenter
changes only
one factor
and observes
or measures
what happens.
What is the Purpose of a
Control?

 Controls are NOT being
tested
 Controls are used for

COMPARISON
Other Variables
   The factor that is changed is
known as the Independent
variable (think - what “I” change)
   The factor that is measured or
observed is called the dependent
variable (think – “data”)
Example of Controls &
Variables
   For example, suppose you want to figure
out the fastest route to the office and
back.
   You will try several different routes and
time how long it takes you to return using
each route.
What are the Variables in

   Changing the route is the
independent variable
   The time it takes is the
dependent variable
   Keeping the same walker
throughout makes the walker a
constant.
One more thing… it is best
to make several trials with
each independent variable.
Remember!
To be a Valid Experiment
   Two groups are required ---
the control & experimental
groups
Data
   Results of the
experiment
   May be
quantitative
(numbers) or
qualitative (any
non numerical
observation)
Data
   Must be
organized
   Can be
organized into
charts,
tables, or
graphs
Times of Office Routes
Routes           Trial 1   Trial 2   Average

Route1
(Down/Up Closest Stairs)
Route 2
(Down Closest/Up Middle Stairs)
Route 3
(Down/Up Middle Stairs)
Conclusion

the hypothesis
based on the
data obtained
from the
experiment
Retest

In order to
verify the
results,
experiments
must be
retested.
Scientific Method
1)”I”dentify a Problem              moo
2) Form a “H”ypothesis about the
problem (if…then…)
3) Design an “E”xperiment to test
the hypothesis
4) “C”ollect data
5) Form a “C”onclusion
6) “R”etest
Silly sentence…..
I Heard Every Cow Can
Roller-skate

```
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