2. I understand what happened with the plates and the mantle between South America and Africa. yes
Or
not yet

Explain your answer choice.

Wikipedia aswell can be used to solve the following questions

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

There are no negative consequences to using nuclear energy.  false. how is the   the hydrogen bomb relies on the process of nuclear fission. true.