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What is 1 + 3?
anything you can change in an experiment that might affect the outcome
a mass hanging from a fixed point that is free to swing to and fro
a motion or activity that repeats itself
an investigation in which one, and only one, variable is changed in order to see is there is an effect
a basic procedure used in a controlled experiment, before changing any of the variables
a type of graph that shows the outcome of a series of experiments when a variable is changed by steps
the greatest amount of fluid a container can hold
the one thing that will change in a controlled experiment
what you find out by doing the experiment (you could also call it the outcome)--it is what you will measure
a set of objects that is working together