Answer:
I am a protector of the scoreboard.
Lighter than what I am made of. More of me is hidden than seen. What am I?
I am flora not fauna. I am foliage not trees. I am shrubbery not grass.
I come with a train and go with a train and the train doesn't need me but can't go without me.
I stand in one place yet fill the whole room. I can be filled with molten rock and come in every hue. What am I?
When is it bad luck to see a black cat?