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Identifying Variables
3 Kinds of Variables ,[object Object],[object Object],[object Object]
3 Kinds of Variables ,[object Object],[object Object],[object Object],[object Object]
3 Kinds of Variables ,[object Object],[object Object],[object Object]
For Example:
Students of different ages were given the same jigsaw puzzle to put together.  They were timed to see how long it took to finish the puzzle.
Identify the variables in this investigation.
What was the independent variable? ,[object Object],[object Object]
What was the dependent variable? ,[object Object],[object Object]
What was a controlled variable? ,[object Object],[object Object],[object Object]
Another example:
An investigation was done with an electromagnetic system made from a battery and wire wrapped around a nail.  Different sizes of nails were used.  The number of paper clips the electromagnet could pick up was measured.
What are the variables in this investigation?
Independent variable: ,[object Object],[object Object]
Dependent variable: ,[object Object],[object Object]
Controlled variables: ,[object Object],[object Object]
One more:
The higher the temperature of water, the faster an egg will boil.
[object Object],[object Object],[object Object]
Last one:
The temperature of water was measured at different depths of a pond.
[object Object],[object Object],[object Object]

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Identifying variables