That 1st pic is from Explorers (3rd dude is Jason Presson) the 2nd IS from Space Camp.
#8 -
Ethan Hawke (Vincent Freeman in Gattaca/Jake Roenick in the remake of Assault on Precinct 13 slated
2005)
#9 -
River Phoenix (Young Indy in I.J. & the Last Crusade/Chris Chambers in Stand by Me)
#10 -
Joaquin Phoenix (Emperor Commodus in Gladiator/Lucius Hunt in The Village)