I'd say option 4, because all of those are capable of changing the enviroment
Answer:
3) they lose energy at a varying rate - is the correct answer.
Radioactive decay is defined as the process by which an unstable atomic nucleus loses its energy by emitting radiations. The decay is random and cannot be predicted earlier.
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Explanation:
Curiosity after a step is completed, when your new hypothesis is more probable than your prior one
Latin I think. It's like nomenclature, or something like that. ☺
Answer:varied in size
Explanation:Galaxies vary in appearance. Galaxies differ greatly in size. Some contain as few as a hundred million stars, but the biggest have more than a trillion stars. Galaxies also vary in shape.