Qualitative Observation: Each pendulum is a different length., Some pendulums swing faster than others., The pendulum weights are white., The pendulum strings are yellow., Sometimes the pendulums line up and swing together., The pendulums swing., The pendulums move like a wave., Inference: The pendulums may keep going unless stopped., The pendulums form this pattern because of their different lengths, The pendulum swings because of its momentum., The pendulum lengths determine the speed at which they swing., Quantitative Observation: There are 15 pendulums., The pendulums swing for 60 seconds., The longest pendulum is 35 centimeters., The shortest pendulum is 20 centimeters., One of the pendulums swings 51 times in a minute.,

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