Something you do to your knees Something found on trees Something a seal does Change the ending to que for a type of ship that was found on the seven seas

I start as sap from forest veins, then heat transforms my polymer chains. I stretch, return, and still endure, made strong and flexible through fires cure.

I float in the ocean, cold and white. Most of me hides below the water. What am I?

A time when I'm green, A time when I'm brown. But both of these times, Cause you to frown. But just in between, For a very short while. I'm perfect and yellow, And cause you to smile. What am I?

It's sooo hard to see deep under the sea. That's why I always carry a light with me. My cousin wears his on his head, I carry mine in my belly instead.