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9th Grade Science is Introductory Physics.  In science, ENERGY is needed for any change to occur.  From the moving bus that brings you to school and the Earth's rotation around the sun; the ice you use to cool your beverages and the heat you generate rubbing your hands together; the static charge that makes your hair stand up and the moving charge that makes lights in your home go on; the disturbances through air that make the sound we hear or through electric and magnetic fields to make the light we see or the communications and medical technology we rely on, energy is at hand.  We will look at energy's role in the changes we observe through our study of motion, forces, electricity, waves, sound and light.