What Am I Riddles

Question:

Look at my apple, keep me near.

Listen closely, I'll put worms in your ear.

What am I?

Question: You wear me every day but you never put me on.
I will change colors if you leave me out too long.

What am I?

Question: I have no eyes, ears, tongue, or nose.
Yet I see, hear, taste, and smell everything.

What am I?

Question: Poke your fingers in my eyes and I will open wide my jaws. Linen cloth, quills, or paper, my greedy lust devours them all.

What am I?

Question: I'm made up of 12 completely different letters but you can type me with just 1, what am I?