| Term | Definition |
|---|
| scientist | a person who wonders why |
| scientific inquiry | the process of finding answers to scientific questions |
| hypothesis | an idea that might answer your question |
| variable | anything that you can change in an experiment that might affect the outcome |
| pendulum | a mass that hangs from a fixed point that is free to swing to and fro |
| cycle | any motion or activity that repeats itself |
| mass | the measurement of the amount of matter something contains |
| Galileo Galilei | an Italian physicist and astronomer who recognized pendulums first through viewing a chandelier |
| Christian Huygens | a Dutch scientist who published a book that explained how the length of a pendulum determined the time it took to swing back and forth |
| control variables | to change one thing at a time |
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