Wave is a periodic (1)_______ that moves away from a source which centies(2)_____ with it. Waves can be typified according to the (3) ______of motion of the vibrating particles with respect to the direction in which the waves travel and acconding to (4)______ . (5)______ waves vibrate perpendicularly to the direction in which the waves navel This wave exhibits up and down motion. Longitudinal waves vibrate (6) ______or back and forth to the direction in which the waves travel. (7) ______waves are combination of transverse and longitudinal waves. These move in a circular pattern as the waves pass by. (8)_____ waves need solid, liquid and gas medium to propagate or travel. Transverse, mechanical and surface waves are examples of mechanical waves. Electromagnetic waves do not need (9)______ to propagate. Radio waves, ultraviolet, infrared, and gamma rays are examples of (10) ______waves. The nature of waves can be described through its terms, quantiues and (11) _______.The (12) ______ and trough refer to the highest point and lowest point of a wave pattern, respectively. The (13) _______of a transverse wave is the maximum displacement of a particle of the medium on either side of its normal position when the wave passes. The frequency of periodic waves is the number of waves that pass a particular point for every one second while the (14)______ is the distance between adjacent crests or toughs. 4. The period is the time required for one complete wave to pass a particular point. The (15) _______of the wave refers to the distance the wave travels per unit time. It is related to the frequency of the wave and wavelength through the following equation: wave speed-frequency z wavelength​