The yellow wood national park sits on a dormant volcanos crater.
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Answer:
Light is made up of wavelengths of light, and each wavelength is a particular colour.
Explanation:
The colour we see is a result of which wavelengths are reflected back to our eyes. The visible spectrum showing the wavelengths of each of the component colours. The spectrum ranges from dark red at 700 nm to violet at 400 nm.Apr 4, 2012
Well if you mean what does the controlled part of a scientific investigation, it is the part of the investigation that will be your control or your base, untouched, original, data and such.
Radiation and deaths of people