An experiment looking at structures smaller than a cell would most likely employ a

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11

Your answer is water because there is combined mass of water found on, under, and over the surface of a planet. your answer is water.

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