pendulum, an object that swings, question, The first step to making an experiment, prediction, Guess what will happen in your experiment, a change, The part of the experiment that you are testing., height, how tall, length, how long, trial, the number of times you try your experiment, measure, to find out how much (how high, how long, how many minutes, seconds), data, information we obtain from experiments (numbers, for example), increase, go up, get bigger, decrease, go down, get smaller.

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