1. CHRONOLOGY OF THE ROCK AND ROLL IN THE CENTURY XX

2. Rock and roll is a musical genre marked rhythm, derived from a mixture of various styles of the american folklore(BLUES y COUNTRY AND WESTERN). The term "rock and roll" was first used by Alan Freed, djs of a radio of Cleveland, which used the term to holder a radio program: Moondog's delivered Rock'n'Roll Parte. This term is usually reserved for the first time in this style (primarily the decade of the 1950s of the 20th century), while its abbreviation, Rock is generally used to refer to the rest of the history of this musical genre.

3. ROCK AND ROLL. Chuck Berry and Little Richard; rock eminently "black". Emergence of Elvis Presley, popularization of rock on a large scale. (Rockabilly) CHRONOLOGY YEARS 50 YEARS 60 MERSEY BEAT. The Beatles and the "British Invasion"; Rolling Stones, The Who. FOLK. Bob Dylan, Joan Baez. SOUL. Ray Charles, James Brown, Aretha Franklyn.

4. LA PSICODELIA. Jimi Hendrix and the revolution of the electric guitar. Jethro Tull (early years), Pink Floyd (early years), las puertas. Use of the moog, mellotron and the Sitar. HARD ROCK. Led Zeppelin, Black Sabbath, AC/DC y Deep Purple In the mid-1960s - early 1970s ROCK SINFONICO (Progressive). Jethro Tull, Pink Floyd, Genesis, Yes and King Crimson: End of the 60's and early 1970s

5. GLAM ROCK. David Bowie, Queen, Alice Cooper. Provocation and makeup. Wave of Hard Rock american. Aerosmith, Kiss, Grand Funk Second stage and final development of Heavy Metal. Judas Priest, Scorpions YEARS 70 FUNK. James Brown, KC and The Sunshine Band, Cool and The Gang. DISCO. Donna Summer, Gloria Gaynor, Earth Wind and Fire, Bee Gees REGGAE. Bob Marley

6. The great explosion of the english PUNK, after the emergence of The Ramones in the U.S. Sex Pistols, The Clash. Mid-1970s (1977) The NEW WAVE, the influence of Punk in the pop and rock. Blondie,, The Police. Use of the synthesizer in the POST-PUNK and New Wave. Depeche Mode. The end of the 70 – 80 Rock sinister, or DARKWAVE influenced by the glam rock, punk (with thematic dark) and especially of the Psychedelic Rock. Siouxsie, la cura. The last 2 years of the 70 and 80.

7. YEARS 80 Second wave Punk, american roots of the HARDCORE: The Misfits, Dead Kennedys. First 80 TECHNO.HOUSE, TRANCE, DRUM AND BASS, JUNGLE. RAP (Hip Hop) The New Wave of british Heavy Metal (NWOBHM). Iron Maiden, Def Leppard. 80 NEW ROMANTHICS. Pop rock whith influences "New Wave"; Tears for Fears, Duran-Duran The Hard Rock 80's or GLAM METAL reaches its greatest boom: Motley Crue, Poison, Europa, Bon Jovi. Mid-1980s, first groups o ROCK ALTERNATIVO. REM

8. THRASH METAL: Metallica, Megadeth, Slayer, Sepultura. Heavy Metal and Hardcore, merging. (Speed, Power) Wave of Rock or POP LATINO in Argentina, appear bands like Soda Stereo. Rock and Metal are fused with Rap and Funk. Faith no more, Red Hot Chili Peppers and Rage Against the Machine. 80 - First 90. Guns and Roses redefining the Hard Rock. GOTHIC METAL, Lacrimosa 80 – 90 DEATH METAL, Sepultura NEW AGE

9. GRUNGE. Seattle becomes the center of the rock.; emerge as main exponents Nirvana, Pearl Jam and Alice y cadenas, years 90 AÑOS 90 Rock Industrial or INDUSTRIAL METAL, with bands like Marilyn Manson, rammstein The BRITPOP was born in England in the mid 1990s, from the hand of Oasis, Blu, la Verve NU METAL, alternative metal such as Korn, Linkin Park or Limp Bizkit, heir to the rock of fusion. In the mid 90s

10. There is a 'NEO PUNK' with groups such as Green Day, The Offspring mainly that carry the punk to a level more commercial. The end of the 90 Second time of the nu-metal; the main groups of the movement are slipknot, System of a Down and Korn among others. Last 90, and the first half of the new decade. TRIP HOP, Massive Atack WORLD BEAT,