amplitude - The height of a wave from rest to crest, or from rest to trough., constraint - A limitation or a restriction., crest - The highest point of a wave., criteria - Guidelines or rules used to make a decision about something., design process - A step-by-step way to solve problems., electromagnetic radiation - A form of energy that is all around us, including radio waves, visible light, and x-rays., electromagnetic spectrum - The range of electromagnetic radiation that is all around us, such as radio waves, visible light, and x-rays., energy - The ability to do work. Waves carry energy from one location to another., evidence - Information that explains or supports a claim., frequency - The number of times something repeats within a fixed period, such as number of cycles per second., light - The form of energy or electromagnetic radiation that makes it possible to see things., medium - Any substance that waves move through., opaque - The property of blocking out all light. Light shining on an opaque object creates a shadow., pattern - Something that is repeated over and over., reflection - The return of waves from a surface., refraction - The bending of rays or waves as they pass from one medium to another., scientific inquiry process - A process that scientists use to explore observations and answer questions., translucent - The property of allowing some light to pass through. You cannot see completely through a translucent object., transparent - The property of allowing almost all light to pass through. You can see through a transparent object., trough - The lowest point of a wave., visible spectrum - The part of the electromagnetic spectrum that people can see. It contains red, orange, yellow, green, blue, indigo, and violet light., wave - A disturbance that travels through space or matter, transferring energy from one place to another. , wavelength - The distance between two corresponding points on a wave.,

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