Hi There!!
Your best answer choice is:
-Sputnik 1 1957.
-Sputnik 2 1957.
-Explorer 6 1959.
-Vostok I 1961.
Well, I really don't know these are the correct orders....
But, I hope this helps you!
:)
Answer: Immigration is where people are coming from another country and Emigration is where someone is leaving one’s country and immigrating to another country
Explanation:
Answer:
yes because it is their own opinion and scientist need a hypothesis
Explanation:
