When water molecules in the atmosphere speed up and fall
The sugar pill serves as a control.
The control in experiments is a sample that remains the same throughout the experiment and it is used to compare the results of the main experiment to. It serves to guarantee that changes noted in the experiment are from the variables introduced and not something else.
Pigments in photosystem 1 use energy from light to reenergize the electrons.
Answer:
c.evaporation
Explanation:
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