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Exp. 1-Swingers

Objectives
• observe and compare the behaviors of pendulums
• gain experience with the concept of variable
• conduct controlled experiments to find out what variables affect the number of cycles a pendulum will complete in a unit of time
• relate pendulum length to the number of cycles it completes in a unit of time
• make concrete, pictorial, and two-coordinate graphs of experimental results
• use graphs to look for errors and make predictions
• use scientific thinking processes to conduct investigations and build explanations:  observing, communicating, comparing, organizing, & relating
 
Vocabulary
pendulum - a mass hanging from a fixed point that is free to swing to and fro
cycle - any motion that repeats itself
variable - anything you can change in an experiment that might affect the outcome

standard - basic procedure used in a controlled experiment, before changing any of the variables
controlled experiment - when only one variable is changed in an experiment in order to assess its effect

two-coordinate graph - shows the outcome of a series of experiments when a variable is changed by steps
independent variable - gets placed on the x-axis of a two-coordinategraph
dependent variable - gets placed on the y-axis of a two-coordinate graph
Part 1 - Exploring Swingers
    Read What Scientists Do

Part 2 - Testing Variables

Part 3 - Predicting Swings
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