1. Transfer Of Heat in Solid Materials 2.A Form Of Energy Produced By Vibration 3.A Form Of Energy That Travels In Straight Line 4.It Is The Back And Forth Movement of objects that produces sound 5.Refer How Strong The Sound Seem To Us When It Reaches Ears 6.Involves Making Sound Determining what object are nearby based on its echoes 7.transfer of heat in liquid and air 8.refers to the highness and lowness of sound 9.transfer of heat open space or light waves 10.its is the bouncing of light back into the direction of the source 11. Is the bending of light as it travels from one type of materials to another like from air to water 12.softness and/or loudness of sound 13.is any undesirable sound which disturb the activities of human or animal lifw 14 when sound waves hit a hard surface they might reflect making the sound bounce and repeat 15.it is formed when light passes in water hanging in the atmosphere