Answer:
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?
What force and strength cannot get through, I with my unique teeth can do. What am I?
I hide but my head is outside. What am I?
What can be as big as an elephant but weighs nothing?
The more you work, the more I'll eat.You keep me full, I'll keep you neat. What am I?
I go in hard, come out soft. Blow me hard and I'll make a pop. What am I?