Where are the 9 sky temple key's?

I don't know which one you're missing, but here are the locations for all of them.

1) Dark/Sky Temple Grounds: Defiled Shrine
2) Dark/Sky Temple Grounds: Accursed Lake
3) Dark/Sky Temple Grounds: Ing Reliquary
4) Dark Agon Wastes: Dark Oasis
5) Dark Agon Wastes: Battleground
6) Dark Torvus Bog: Dungeon
7) Dark Torvus Bog: Poisoned Bog
8) Dark Sanctuary Fortress: Hive Entrance
9) Dark Sanctuary Fortress: Hive Dynamo Works

Peace.

Here are the locations for the 9 Sky Temple Keys:

1) Sky Temple Grounds: Defiled Shrine
2) Sky Temple Grounds: Accursed Lake
3) Sky Temple Grounds: Ing Reliquary
4) Dark Agon Wastes: Dark Oasis
5) Dark Agon Wastes: Battleground
6) Dark Torvus Bog: Dungeon
7) Dark Torvus Bog: Poisoned Bog
8) Ing Hive: Hive Entrance
9) Ing Hive: Hive Dynamo Works

As for finding them within the rooms, that's up to you...
Once you get them all, go to the Sky Temple Gateway of Sky Temple Grounds...
HAVE FUN!!!

the fifth sky temple key is'nt in the battlegrounds