Complete the paragraph with the correct transitional words. Before the Big Bang, there was no matter in the universe. It was a dense, hot, soupy mixture. Scientists call this stuff quark-gluon plasma, or quark soup in layman’s terms. BLANK (moreover, eventually, meanwhile), this plasma cooled and gave rise to the first atoms, mostly helium and hydrogen. BLANK (then, lastly, besides), the first stars and galaxies formed. BLANK (furthermore, however, to conclude), scientists still do not have conclusive evidence of how the first stars and galaxies in the universe came into being.

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