Answer:
I transfer oxygen from the atmosphere to your blood
I am essential to life on earth! I am split into thirds. Two thirds are the same. One of the thirds is 8. The other two are 1 each.
I am the book one can never finish reading
I fly when I'm on and float coming off.
What invention lets you look right through a wall?
When is it bad luck to see a black cat?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic