Answer:
The factor that is tested is called the variable.
The variable is also what is changed in an experiment.
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The primary succession takes a long time to be done. the secondary succesion takes 200-500 years for completion. the secondary succession occurs in an area which has been denuded recently and lately inhabited. soil is present at the beginning of the secondary succession with some organisms. thank you for this question.
The color produced by one milligram of platinum cobalt in one liter of dissolved water is fixed as one unit of color in platinum-cobalt scale.
The fill in the blank answer is increased
Converting solar energy does not affect the earth system
