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Waves S8P4. Students will explore the wave nature of _______________ and _________________________ radiation. a. Identify the ____________________ of ____________________ and ________________________ waves. What are waves? Waves carry _______________ ◦ Rhythmic disturbances that _______________ _______________ ______________ _______________ _______________ are called waves. Models of Waves Waves Waves transfer _______________, but ______ ______ _______________matter. Mechanical Waves Waves that _______________ _______________ _______ _________________ _______________ are mechanical waves. _______ _______________ _______________ _______________ a mechanical wave travels is called a medium. A mechanical wave travels as _______________ _______ _______________ __________ _______________ _____ _______________ in the medium. There are _____ kinds of mechanical waves. _______________ Waves A type of mechanical wave. The wave energy causes the matter in the medium to move _____ _______ _________ or __________ ________ __________ at _______________ _______________ to the direction the wave travels. ____________________ Waves A type of mechanical wave. In a compressional wave, matter in the medium moves _______________ _____ _______________ along the _______________ _______________ that the wave travels. Sound Waves Sound waves are _______________ waves. Electromagnetic Waves Waves that can _______________ _______________ _______________ where there is no matter are electromagnetic waves. There are _______________ _______________ of electromagnetic waves, including radio waves, X rays, and gamma rays. These waves can travel in matter or in space. Radiant Energy The sun emits ____________________ _______________ that travel through space and reach Earth. The energy carried by electromagnetic waves is called ______________ _______________. Most of the radiant energy that reaches Earth from the sun is carried by _______________ and _______________ _______________ waves. Summary What is a wave? ◦ Waves transfer _______________, but do _______ transfer _________________. Mechanical Waves ◦ Mechanical waves _______________ _____ _______________ in which to travel. ◦ When a transverse wave travels, particle of the medium move at _____________ _______________ to the direction the wave is traveling. ◦ When a compressional wave travels, particles of the medium move ___________ ________ _______________ along the same direction the wave is traveling. ◦ _______________ is a compressional wave. Electromagnetic Waves ◦ Electromagnetic waves can _______________ _______________ _______________ _______________. ◦ The sum emits _______________ _______________ of electromagnetic waves, including infrared, visible light, and ultraviolet waves. Wave Properties S8P4 f. Diagram the parts of the wave and explain how the parts are affected by changes in amplitude and pitch. Amplitude The _______________ above or below the _______________ _______________ of a wave is the amplitude. Amplitude and Energy A wave’s _______________ is related to the _______________ that the wave carries. The _______________ the light the _______________ the _______________ the ________________ the light the _______________ the _______________. The ______________ the sound the _______________ the _______________ the _______________ the sound the _______________ the _______________. Transverse wave diagram Compressional wave diagram Wavelength For a transverse wave, wavelength is _________________________________________ __________________________________________________________________, or ________________________________________________________________________ _______________________________________________________________________. For a compressional wave, the wavelength is __________________________________ ____________________________________________________________________, or ________________________________________________________________________ _______________________________________________________________________. Electromagnetic waves Frequency The frequency of a wave is _________________________________________________ _______________________________________________________________________. The unit of frequency is __________________________________________________, or ____________________________. Frequency and Wavelength __________ _______________ result in _______________ _______________. _______________ _______________ result in _______________ _______________. Color Because frequency and wavelength are related, either the ______________________ or _____________________ of a light wave __________________ the ______________ of the ________________. For example, blue light has a larger frequency and shorter wavelength than red light. Pitch Either the _______________ or _______________ determines the ______________ of a sound wave. Pitch is _________________________________________________________________. The _______________ of the notes on a musical scale ________________ as the notes get _______________ in _______________, but the __________________ of the notes ____________________. Summary Amplitude ◦ In a transverse wave, the amplitude is ___________________________________ __________________________________________________________________ ◦ The _______________ the _______________, the _______________ the _______________carried by the wave. Wavelength ◦ For a transverse wave, wavelength is ____________________________________, or ________________________________________________________________. ◦ For a compressional wave, wavelength is ________________________________ _____________________________________, or __________________________ __________________________________________________________________. Frequency ◦ The frequency of a wave is ____________________________________________ __________________________________________________________________. ◦ For waves that travel _________________________________________, as the __________________________ of the wave __________________________, its _______________ ______________________.