Scientific Method and Graphing
嚜燙cientific Method and Graphing
Objectives - Students will be able to:
1.Explain what an independent and a dependent variable are.
2.Properly label a data table and graph
3.Create a graph from a data table
Scientific Method
Hopefully, this is a review for most of you.
By the raise of hands, what are the steps to the scientific
method?
Scientific Method
Make an observation
Form an educated guess (hypothesis)
Test hypothesis*
Form a rule
* It is ok for the test to show that your hypothesis was wrong
Variables
We will spend most of our lab time doing experiments and
trying to understand the data.
Variable 每 Something that changes
How many variables are there in any given experiment?
Independent variable 每 the one variable that is deliberately
changed
Dependent variable 每 the one variable that is affected by
the independent variable; this is what you measure
Control variable 每 any variable that is held constant; there
can be many variables in this category
Variables
Check for understanding 每 You*re tapping the gas pedal in
your car to see what happens to the A/C. Identify the
independent and the dependent variable.
Check for understanding 每 You*re adding water to juice to
see how diluted it gets. Which are the independent,
dependent, and control variables?
Data Tables and Graphs
During the experiment, we measure how much each
variable changes. At the end, we have a lot of data that
needs to be put in some format that makes it easy for
people to understand. For this, we use data tables and
graphs.
Check for understanding 每 With your table partner, come
up with at least three examples of where you see data
shown in a table and three examples of where you see data
shown in a graph.
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