'Red shift' is a key concept for astronomers. The term can be understood literally - the wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum.
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Answer: It's showing the change of the average temperature.
Explanation:
A catalyst.
A catalyst speeds up a chemical reaction by increasing the reaction's rate. It does so by decreasing the reaction's required activation energy, which allows the products of the reaction to more easily combine. During this whole process, the catalyst does not change.
<span>One characteristic of most of the tropical open oceans that is directly responsible for the low chlorophyll levels in these waters is </span>Low nutrient concentrations.