4.0 LIGHT, SOUND & ENERGY
DEMONSTRATE KNOWLEDGE OF LIGHT AND SOUND
4.1		What light is and how it travels
4.2		The use of lenses and how the eye sees color
4.3		Sound, described by its wavelength, frequency, amplitude, speed, and pitch
DEMONSTRATE KNOWLEDGE OF ENERGY, WORK, AND MACHINES
4.4		Forms and changes of energy
4.5		Friction
4.6		Ramps
4.7		Levers/pulley
4.8		Wheels/axels