The following riddles have the corresponding solutions:

RIDDLE - SOLUTION
I am always hungry. I must always be fed. The finger I lick will soon turn red. What am I? - FIRE
At the sound of me men may dream or stamp their feet. At the sound of me women may laugh or sometimes weep. What am I? - MUSIC
My life can be measured in hours. I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe. What am I? - CANDLE
To unravel me you need a simple key. No key that was made by locksmith's hand. But a key that only I will understand. What am I? - RIDDLE
Bright as diamonds. Loud as thunder. Never still. A thing of wonder. What am I?
WATERFALL
I go around in circles. But always straight ahead. Never complain. No matter where I am led. What am I? - WHEEL