All waves carry ____. ____ waves must have a medium to travel. ____ waves are mechanical waves and move ____ to the disturbance. ____ waves can be mechanical waves or electromagnetic waves and move ____ to the disturbance. ____ waves do not need a medium to travel, they can travel in a ____. The frequency of the wave affects the ____ of the wave. The ____ of the wave is how far it can travel in a set amount of time and can be measured in ____. The type of ____ affects the speed of a wave.

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