is a tree a piece of wood?

Not if it falls over and there's no one there to hear it.

google can not answer this question.

Wood comes from trees I believe

I don't know if it works the other way round?

We could describe wood as a piece of tree...that works, I think?

He means a tree as a piece of the wood, or a section of forest.

Ask a woodpecker....

We call them treepeckers here.

No, a tree is a complex organism called a plant. Wood is what we call the material which supports the structure.
Are we a piece of bone?

He means a tree as a piece of the wood, or a section of forest. mouse

oh dear I have been caught again, yes that holds

That's not what he said, we cannot allow the interpretation of an apologist for bad grammar.