Dear youngsters, could you answer the following questions.

1. If you throw me out of the window, I'll leave a grieving wife. Bring me back, but through a door, you'll see someone giving life. What am I?
2. When warm my house expands and when cold it contracts, I am vital to a certain type of pact. What am I?
3. Four hang, four sprang, two points the way, two to ward off dogs, one dangles after, always rather dirty. What am I?
4. Round like an apple, deep like a cup, but all the kings’ horses can't pull it up. What is it?
5. What is brown or silver, has a head and tail but no arms or legs?
6. A thousand wheels, but move I do not. Call me what I am, call me a lot. What am I?

Answers to last week questions:

1. Knowledge
2. Time
3. Egg
4. Shadow
5. Mountain
6. Red hot iron