Waves, Chapter 20 (PS 8 & 9) Name ___________________________________________ Section 20-1 Vocabulary Explanation Drawing/Example A disturbance that transmits ENERGY (not matter!) Wave through SPACE and/or MATTER. To make the wave travel further, it has to have more can be mechanical or ENERGY. (Think of yelling!) electromagnetic Examples: LIGHT, SOUND, OCEAN A SUBSTANCE the wave travels through, such as Think about solids/liquid/gas Medium SOLIDS, LIQUIDS OR GAS. particle arrangement The matter DOES NOT move with the wave, just the ENERGY! Ex: DOMINOES HITTING Mechanical Wave Require a MEDIUM DOMINOES… CARRIES ENERGY, (type) Particles bump particles to transmit energy BUT NOT THE DOMINO (matter & medium)= Examples: SOUND, WATER m & m’s EM (ElectroMagnetic) SPECTRUM Electromagnetic Do not require a MEDIUM Wave (type) Examples: LIGHT WAVES (microwaves, radio, light, xray) Waves in which particles vibrate with an UP & DOWN Transverse MOTION and the particles move PERPENDICULAR to All transverse! the direction the wave is traveling. Require a medium? NO Examples: EM WAVES Waves in which particles of the MEDIUM vibrate BACK Compression / & FORTH (particles bump barticles) Longitudinal along the path the wave travels. (and repeat pattern) (make graphic Require a medium? YES organizer now) Examples: SOUND The HIGHEST point of a TRANSVERSE wave Crest The LOWEST point of a TRANSVERSE wave Trough The area where the PARTICLES of the wave CROWD Compression TOGETHER for a COMPRESSION (longitudinal) wave The area of where the PARTICLES of the wave SPREAD Rarefaction APART for a COMPRESSION (longitudinal) wave (label wave diagrams now) Section 20-1 Review
Waves, Chapter 20 (PS 8 & 9) Name ___________________________________________ Section 20-1 Vocabulary Explanation Drawing/Example Wave can be mechanical or electromagnetic A disturbance that transmits ENERGY (not matter!) through SPACE and/or MATTER. To make the wave travel further, it has to have more ENERGY. (Think of yelling!) Examples: LIGHT, SOUND, OCEAN Medium A SUBSTANCE the wave travels through, such as SOLIDS, LIQUIDS OR GAS. The matter DOES NOT move with the wave, just the ENERGY! Think about solids/liquid/gas particle arrangement Mechanical Wave (type) (matter & medium)= m & m’s Require a MEDIUM Particles bump particles to transmit energy Ex: DOMINOES HITTING DOMINOES… CARRIES ENERGY, BUT NOT THE DOMINO Examples: SOUND, WATER Electromagnetic Wave (type) Do not require a MEDIUM EM (ElectroMagnetic) SPECTRUM Examples: LIGHT WAVES (microwaves, radio, light, xray) Transverse All transverse! Waves in which particles vibrate with an UP & DOWN MOTION and the particles move PERPENDICULAR to the direction the wave is traveling. Require a medium? NO Examples: EM WAVES Compression / Longitudinal (make graphic organizer now) Waves in which particles of the MEDIUM vibrate BACK & FORTH (particles bump barticles) along the path the wave travels. (and repeat pattern) Require a medium? YES Examples: SOUND Crest The HIGHEST point of a TRANSVERSE wave Trough The LOWEST point of a TRANSVERSE wave Compression The area where the PARTICLES of the wave CROWD TOGETHER for a COMPRESSION (longitudinal) wave Rarefaction (label wave diagrams now) The area of where the PARTICLES of the wave SPREAD APART for a COMPRESSION (longitudinal) wave Section 20-1 Review