What is the name of these Sacrifice moves?

with a temporary queen sacrifice white win material.

1.ng6! Qxf5(after 1....Rd7 2. Ne7+ white gains even more) 2. Nxe7+

White sacrifices a knight to win back more material: 1. nxg6+! hxg6 2. Qh4+ Kg8 3. rxe7

Also what does the exclamation point mean?

pls show the diagram

black can't move his rook in the first move

The exclamation point means that its a strong move

how do you make a diagram

Click the button on the far left of the toolbar above the text box where you can enter a reply. It looks like a board... 

 Diagram #1

those two diagrams are in susan polgar book and my first post is the answers to the diagram but i was wondering as to what is the name of the move

Let's clarify some symbols

! is a good move

!! is a brilliant move

!? is an interesting move

?! is a dubious move

? is a bad move

?? is a blunder

Rarely are sacrifices named, these are not typical enough to deserve a name I guess.

yeah,because sacs arn't used that much...

 thanks abunch for clarifying that for me