What Am I Riddles

Question: What grows when it eats, but dies when it drinks?

Question: When is... 5>0, 0>2 and 2>5? Hint: Hands

Question: It breaks away from its pack. It creates holes in its victims. It can travel for miles and then disappear. It is part of a dying breed. What is it?

Question: Cold and dark, I'm the same as my neighbor. Flatter than a pancake, faster than a panther. Lighter than a feather I still prevail, Yet a million mean trying to lift me would fail. Expanding and shrinking throughout the day, When heat is highest, underneath I lay. I leave in the darkness of the night, And don't come back if there's rain in sight. What am I?

Question: what comes in hard comes out soft and you blow ???????????????????????????????????????/