1. electric energy 
Michael Collins in the Columbia 
2. cotton gin 
Thomas Edison 
3. warns about approaching storms 
Neil Armstrong and Edwin Aldrin 
4. warns about missiles sent up anywhere 
capable of destruction 
5. instant communication 
conservation 
6. walked on the moon 
Tiros I 
7. orbited the moon 
Midas II 
8. protecting natural resources 
Telstar 
9. atomic power 
Eli Whitney