Summarization
Directions: The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Spell out the missing letters of the word.

     A wave has height, from trough (low point) to crest (high Point). It has length-the distance from this crest to that of the following wave. The period of the wave means the time it takes for succeeding crests to pass a fixed point. None of these things stays the same-for all depend upon te wind, upon the depth of the water and many other matters.

P description of a wave.