Direct Relationship - As X increases Y increases, Indirect Relationship - As X increases Y decreases, No Relationship - As X increases Y remains the same, Cyclic Relationship - As X increases Y repeats, Independent Variable - What you control, goes on X axis, Dependent Variable  - What you measure, goes on Y axis, Range - change in Y, Wavelength  - distance from crest to crest or trough to trough, Crest  - top of a wavelength, Trough  - bottom of a wavelength, Frequency - number of time a wavelength repeats in a given time, High Frequency - short wavelength, many wavelengths is a small area, Low Frequency - long wavelength, few wavelengths in an area, Origin - Point of rest between crest and trough (halfway), Ampiltude - Distance from rest to crest or trough, Observation - description of the environment using any of the five senses, Inference - A conclusion based on observations, Find data not measured - Intersect the line on your graph and go across to find the unknown, Patterns & Trends - Are easier to see after making graphs, Units - Numbers in science must have these,

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