Answer:
If a man carried my burden, he would break his back. I am not rich, but leave silver in my track.
I'm a god. I'm a planet. I measure heat.
I am the red tongue of the earth, that buries cities.
What's as small as a mouse but guards a house like a lion?
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
When is it bad luck to see a black cat?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?