One way bacteria are important to the earth and its ecosystems is that a. bacteria use oxygen. b. bacteria produce acetone. c. bacteria decompose dead organisms. d. bacteria concentrate valuable minerals.

Definitely decompose dead organisms, otherwise there would be no oil for us!

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