You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

Take one out and scratch my head, I am now black but once was red. What am I?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

What am I?

I’m tall when I’m young, and I’m short when I’m old. What am I?

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.