1) what is wave a) variariation or disturbance that transmit energy in orderly matter or space  b) the highgest point 2) What is mechanical wave a) wave that dont need to travel b) waves that needs medium to travel throug 3) Electromagnetic waves a) waves that dont need a medium travel b) tsunami 4) Crest a) the lowest point of the wave b) the highest point of the wave 5) Trough a) the lowest point of the wave b) some kind of wave that is big 6) Amplitude a) the distance of the wave b) the heigth of the wave 7) Wavelength a) the distance from the crest to other b) the altitude of the wave 

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